diff --git a/src/components/chat/AgentProgressTimeline.tsx b/src/components/chat/AgentProgressTimeline.tsx
index 1b69d68..cecf6fd 100644
--- a/src/components/chat/AgentProgressTimeline.tsx
+++ b/src/components/chat/AgentProgressTimeline.tsx
@@ -81,6 +81,7 @@ const formatToolTitle = (item: ChatProgress) => {
   if (text.includes("locate_features")) return "地图定位";
   if (text.includes("view_history")) return "打开历史曲线";
   if (text.includes("view_scada")) return "打开 SCADA 面板";
+  if (text.includes("render_junctions")) return "渲染节点";
   return item.title;
 };
 
diff --git a/src/components/chat/ChatToolCallBlock.tsx b/src/components/chat/ChatToolCallBlock.tsx
index a05a497..d396a76 100644
--- a/src/components/chat/ChatToolCallBlock.tsx
+++ b/src/components/chat/ChatToolCallBlock.tsx
@@ -131,6 +131,12 @@ const TOOL_META: Record<string, ToolMeta> = {
     actionLabel: "显示",
     color: "#73c0de",
   },
+  render_junctions: {
+    label: "渲染节点",
+    icon: <LocationOnRounded sx={{ fontSize: 18 }} />,
+    actionLabel: "应用渲染",
+    color: "#3b82f6",
+  },
 };
 
 /* ---------- helpers ---------- */
@@ -261,6 +267,14 @@ function getToolDescription(toolCall: ToolCall): string {
     case "show_chart": {
       return (params.title as string | undefined) ?? "数据图表";
     }
+    case "render_junctions": {
+      const nodeAreaMap =
+        params.node_area_map && typeof params.node_area_map === "object"
+          ? (params.node_area_map as Record<string, unknown>)
+          : {};
+      const areaIds = Array.isArray(params.area_ids) ? params.area_ids : [];
+      return `${Object.keys(nodeAreaMap).length} 个节点 · ${areaIds.length || new Set(Object.values(nodeAreaMap).map(String)).size} 个分区`;
+    }
     default:
       return "";
   }
@@ -383,6 +397,31 @@ function buildAction(toolCall: ToolCall): ChatToolAction | null {
         xAxisName: params.x_axis_name as string | undefined,
         yAxisName: params.y_axis_name as string | undefined,
       };
+    case "render_junctions": {
+      const nodeAreaMap =
+        params.node_area_map && typeof params.node_area_map === "object"
+          ? Object.fromEntries(
+              Object.entries(params.node_area_map as Record<string, unknown>)
+                .map(([key, value]) => [String(key), String(value ?? "")])
+                .filter(([, value]) => value.trim().length > 0),
+            )
+          : {};
+      return {
+        type: "render_junctions",
+        nodeAreaMap,
+        areaIds: Array.isArray(params.area_ids)
+          ? params.area_ids.map((item) => String(item).trim()).filter(Boolean)
+          : [],
+        areaColors:
+          params.area_colors && typeof params.area_colors === "object"
+            ? Object.fromEntries(
+                Object.entries(params.area_colors as Record<string, unknown>)
+                  .map(([key, value]) => [String(key), String(value ?? "")])
+                  .filter(([, value]) => value.trim().length > 0),
+              )
+            : {},
+      };
+    }
     default:
       return null;
   }
diff --git a/src/components/chat/hooks/useAgentToolActions.ts b/src/components/chat/hooks/useAgentToolActions.ts
index 7d57e62..6017bb1 100644
--- a/src/components/chat/hooks/useAgentToolActions.ts
+++ b/src/components/chat/hooks/useAgentToolActions.ts
@@ -136,6 +136,26 @@ const resolveTimeRange = (params: Record<string, unknown>) => ({
     (params.end as string | undefined),
 });
 
+const resolveStringRecord = (value: unknown): Record<string, string> => {
+  if (!value || typeof value !== "object" || Array.isArray(value)) {
+    return {};
+  }
+
+  return Object.fromEntries(
+    Object.entries(value as Record<string, unknown>)
+      .map(([key, recordValue]) => [String(key), String(recordValue ?? "")])
+      .filter(([, recordValue]) => recordValue.trim().length > 0),
+  );
+};
+
+const resolveStringArray = (value: unknown): string[] => {
+  if (!Array.isArray(value)) {
+    return [];
+  }
+
+  return value.map((item) => String(item).trim()).filter(Boolean);
+};
+
 const compactNames = (names: string[]) => {
   if (!names.length) return "";
   return names.length > 3
@@ -230,6 +250,24 @@ const buildToolAction = (
     };
   }
 
+  if (tool === "render_junctions") {
+    const nodeAreaMap = resolveStringRecord(params.node_area_map);
+    const areaIds = resolveStringArray(params.area_ids);
+    const areaColors = resolveStringRecord(params.area_colors);
+
+    return {
+      action: {
+        type: "render_junctions",
+        nodeAreaMap,
+        areaIds,
+        areaColors,
+      },
+      kind: "map",
+      title: "渲染节点分区",
+      description: `${Object.keys(nodeAreaMap).length} 个节点`,
+    };
+  }
+
   return {
     action: null,
     kind: "tool",
diff --git a/src/components/olmap/DMALeakDetection/DMALeakDetectionPanel.tsx b/src/components/olmap/DMALeakDetection/DMALeakDetectionPanel.tsx
index 40d4c69..f3892d4 100644
--- a/src/components/olmap/DMALeakDetection/DMALeakDetectionPanel.tsx
+++ b/src/components/olmap/DMALeakDetection/DMALeakDetectionPanel.tsx
@@ -17,18 +17,14 @@ import {
   ChevronRight,
   FormatListBulleted,
 } from "@mui/icons-material";
-import WebGLVectorTileLayer from "ol/layer/WebGLVectorTile";
-import VectorTileSource from "ol/source/VectorTile";
-import { VectorTile } from "ol";
-import { FlatStyleLike } from "ol/style/flat";
 import { useMap } from "@components/olmap/core/MapComponent";
 import StyleLegend from "@components/olmap/core/Controls/StyleLegend";
 import AnalysisParameters from "./AnalysisParameters";
 import SchemeQuery from "./SchemeQuery";
 import RecognitionResults from "./RecognitionResults";
+import { applyJunctionAreaRender } from "./applyJunctionAreaRender";
 import { getAreaColor } from "./utils";
 import { LeakageResultDetail, LeakageSchemeRecord } from "./types";
-import { config } from "@/config/config";
 
 const TabPanel = ({
   value,
@@ -82,101 +78,26 @@ const DMALeakDetectionPanel: React.FC = () => {
 
   useEffect(() => {
     if (!map) return;
-    const junctionLayer = map
-      .getAllLayers()
-      .find(
-        (layer) =>
-          layer instanceof WebGLVectorTileLayer && layer.get("value") === "junctions",
-      ) as WebGLVectorTileLayer | undefined;
-    if (!junctionLayer) return;
-    const source = junctionLayer.getSource() as VectorTileSource;
-    if (!source) return;
-
-    if (!loadedResult || !loadedResult.node_area_map) {
-      junctionLayer.setStyle(config.MAP_DEFAULT_STYLE as FlatStyleLike);
-      return;
-    }
 
     const fallbackAreaIds = Array.from(
-      new Set(Object.values(loadedResult.node_area_map || {}).map(String)),
+      new Set(Object.values(loadedResult?.node_area_map ?? {}).map(String)),
     );
-    const areaIds = (loadedResult.areas || []).length
-      ? loadedResult.areas.map((area) => String(area.area_id))
+    const areaIds = (loadedResult?.areas ?? []).length
+      ? (loadedResult?.areas ?? []).map((area) => String(area.area_id))
       : fallbackAreaIds;
-    if (areaIds.length === 0) {
-      junctionLayer.setStyle(config.MAP_DEFAULT_STYLE as FlatStyleLike);
-      return;
-    }
-
-    const areaIdToIndex = new Map<string, number>();
-    areaIds.forEach((areaId, index) => {
-      areaIdToIndex.set(areaId, index + 1);
-    });
-
-    const nodeAreaIndexMap = new Map<string, number>();
-    Object.entries(loadedResult.node_area_map || {}).forEach(([nodeId, areaId]) => {
-      const idx = areaIdToIndex.get(String(areaId));
-      if (idx !== undefined) {
-        nodeAreaIndexMap.set(String(nodeId), idx);
-      }
-    });
-
-    const applyFeatureAreaIndex = (renderFeature: any) => {
-      const featureId = String(renderFeature.get("id") ?? "");
-      const areaIndex = nodeAreaIndexMap.get(featureId);
-      if (areaIndex !== undefined) {
-        renderFeature.properties_[DMA_AREA_INDEX_PROPERTY] = areaIndex;
-      }
-    };
-
-    const sourceTiles = (source as any).sourceTiles_;
-    if (sourceTiles) {
-      Object.values(sourceTiles).forEach((vectorTile: any) => {
-        const renderFeatures = vectorTile.getFeatures();
-        if (!renderFeatures || renderFeatures.length === 0) return;
-        renderFeatures.forEach((renderFeature: any) => {
-          applyFeatureAreaIndex(renderFeature);
-        });
-      });
-    }
-
-    const listener = (event: any) => {
-      try {
-        if (event.tile instanceof VectorTile) {
-          const renderFeatures = event.tile.getFeatures();
-          if (!renderFeatures || renderFeatures.length === 0) return;
-          renderFeatures.forEach((renderFeature: any) => {
-            applyFeatureAreaIndex(renderFeature);
-          });
-        }
-      } catch (error) {
-        console.error("Error applying DMA area mapping:", error);
-      }
-    };
-    source.on("tileloadend", listener);
-
-    const fillCases: any[] = [];
-    areaIds.forEach((areaId, index) => {
-      fillCases.push(
-        ["==", ["get", DMA_AREA_INDEX_PROPERTY], index + 1],
-        getAreaColor(areaId),
-      );
-    });
-    const defaultFillColor = String(config.MAP_DEFAULT_STYLE["circle-fill-color"]);
-    const defaultStrokeColor = String(
-      config.MAP_DEFAULT_STYLE["circle-stroke-color"],
+    const areaColors = Object.fromEntries(
+      areaIds.map((areaId) => [areaId, getAreaColor(areaId)]),
     );
-    const dmaStyle: FlatStyleLike = {
-      ...config.MAP_DEFAULT_STYLE,
-      "circle-fill-color": ["case", ...fillCases, defaultFillColor],
-      "circle-stroke-color": ["case", ...fillCases, defaultStrokeColor],
-    };
-    junctionLayer.setStyle(dmaStyle);
 
-    return () => {
-      source.un("tileloadend", listener);
-      junctionLayer.setStyle(config.MAP_DEFAULT_STYLE as FlatStyleLike);
-    };
+    return applyJunctionAreaRender(
+      map,
+      {
+        nodeAreaMap: loadedResult?.node_area_map ?? {},
+        areaIds,
+        areaColors,
+      },
+      { propertyKey: DMA_AREA_INDEX_PROPERTY },
+    );
   }, [map, loadedResult]);
 
   return (
diff --git a/src/components/olmap/DMALeakDetection/applyJunctionAreaRender.ts b/src/components/olmap/DMALeakDetection/applyJunctionAreaRender.ts
new file mode 100644
index 0000000..bd3c7c4
--- /dev/null
+++ b/src/components/olmap/DMALeakDetection/applyJunctionAreaRender.ts
@@ -0,0 +1,147 @@
+import { Map as OlMap, VectorTile } from "ol";
+import WebGLVectorTileLayer from "ol/layer/WebGLVectorTile";
+import VectorTileSource from "ol/source/VectorTile";
+import { FlatStyleLike } from "ol/style/flat";
+
+import { config } from "@/config/config";
+import { getAreaColor } from "./utils";
+
+const JUNCTION_LAYER_VALUE = "junctions";
+const RENDER_OWNER_KEY = "junction-area-render-owner";
+
+export type JunctionAreaRenderPayload = {
+  nodeAreaMap: Record<string, string>;
+  areaIds?: string[];
+  areaColors?: Record<string, string>;
+};
+
+type ApplyJunctionAreaRenderOptions = {
+  propertyKey?: string;
+};
+
+const DEFAULT_PROPERTY_KEY = "junction_area_render_index";
+
+const getJunctionLayer = (map: OlMap) =>
+  map
+    .getAllLayers()
+    .find(
+      (layer) =>
+        layer instanceof WebGLVectorTileLayer &&
+        layer.get("value") === JUNCTION_LAYER_VALUE,
+    ) as WebGLVectorTileLayer | undefined;
+
+export const applyJunctionAreaRender = (
+  map: OlMap,
+  payload: JunctionAreaRenderPayload,
+  options: ApplyJunctionAreaRenderOptions = {},
+) => {
+  const propertyKey = options.propertyKey ?? DEFAULT_PROPERTY_KEY;
+  const junctionLayer = getJunctionLayer(map);
+  if (!junctionLayer) {
+    return () => {};
+  }
+
+  const source = junctionLayer.getSource() as VectorTileSource | null;
+  if (!source) {
+    return () => {};
+  }
+
+  const ownerId = `${propertyKey}-${Date.now().toString(36)}-${Math.random()
+    .toString(36)
+    .slice(2, 8)}`;
+
+  const normalizedNodeAreaMap = Object.fromEntries(
+    Object.entries(payload.nodeAreaMap ?? {}).map(([nodeId, areaId]) => [
+      String(nodeId),
+      String(areaId),
+    ]),
+  );
+
+  const areaIds = (
+    payload.areaIds?.length
+      ? payload.areaIds
+      : Array.from(new Set(Object.values(normalizedNodeAreaMap)))
+  )
+    .map(String)
+    .filter(Boolean);
+
+  if (Object.keys(normalizedNodeAreaMap).length === 0 || areaIds.length === 0) {
+    junctionLayer.setStyle(config.MAP_DEFAULT_STYLE as FlatStyleLike);
+    return () => {};
+  }
+
+  const areaIdToIndex = new Map<string, number>();
+  areaIds.forEach((areaId, index) => {
+    areaIdToIndex.set(areaId, index + 1);
+  });
+
+  const nodeAreaIndexMap = new Map<string, number>();
+  Object.entries(normalizedNodeAreaMap).forEach(([nodeId, areaId]) => {
+    const areaIndex = areaIdToIndex.get(areaId);
+    if (areaIndex !== undefined) {
+      nodeAreaIndexMap.set(nodeId, areaIndex);
+    }
+  });
+
+  const applyFeatureAreaIndex = (renderFeature: any) => {
+    const featureId = String(renderFeature.get("id") ?? "");
+    const areaIndex = nodeAreaIndexMap.get(featureId);
+    if (areaIndex !== undefined) {
+      renderFeature.properties_[propertyKey] = areaIndex;
+    }
+  };
+
+  const sourceTiles = (source as any).sourceTiles_;
+  if (sourceTiles) {
+    Object.values(sourceTiles).forEach((vectorTile: any) => {
+      const renderFeatures = vectorTile.getFeatures();
+      if (!renderFeatures || renderFeatures.length === 0) return;
+      renderFeatures.forEach((renderFeature: any) => {
+        applyFeatureAreaIndex(renderFeature);
+      });
+    });
+  }
+
+  const listener = (event: any) => {
+    try {
+      if (!(event.tile instanceof VectorTile)) return;
+      const renderFeatures = event.tile.getFeatures();
+      if (!renderFeatures || renderFeatures.length === 0) return;
+      renderFeatures.forEach((renderFeature: any) => {
+        applyFeatureAreaIndex(renderFeature);
+      });
+    } catch (error) {
+      console.error("Error applying junction area render:", error);
+    }
+  };
+
+  source.on("tileloadend", listener);
+
+  const fillCases: any[] = [];
+  areaIds.forEach((areaId, index) => {
+    fillCases.push(
+      ["==", ["get", propertyKey], index + 1],
+      payload.areaColors?.[areaId] ?? getAreaColor(areaId),
+    );
+  });
+
+  const defaultFillColor = String(config.MAP_DEFAULT_STYLE["circle-fill-color"]);
+  const defaultStrokeColor = String(
+    config.MAP_DEFAULT_STYLE["circle-stroke-color"],
+  );
+
+  junctionLayer.set(RENDER_OWNER_KEY, ownerId);
+  junctionLayer.setStyle({
+    ...config.MAP_DEFAULT_STYLE,
+    "circle-fill-color": ["case", ...fillCases, defaultFillColor],
+    "circle-stroke-color": ["case", ...fillCases, defaultStrokeColor],
+  } as FlatStyleLike);
+
+  return () => {
+    source.un("tileloadend", listener);
+    if (junctionLayer.get(RENDER_OWNER_KEY) === ownerId) {
+      junctionLayer.unset(RENDER_OWNER_KEY, true);
+      junctionLayer.setStyle(config.MAP_DEFAULT_STYLE as FlatStyleLike);
+    }
+  };
+};
diff --git a/src/components/olmap/core/Controls/Toolbar.tsx b/src/components/olmap/core/Controls/Toolbar.tsx
index 58b6721..e2a0747 100644
--- a/src/components/olmap/core/Controls/Toolbar.tsx
+++ b/src/components/olmap/core/Controls/Toolbar.tsx
@@ -1,4 +1,4 @@
-import React, { useState, useEffect, useCallback } from "react";
+import React, { useState, useEffect, useCallback, useRef } from "react";
 import { useData, useMap } from "../MapComponent";
 import ToolbarButton from "@/components/olmap/common/ToolbarButton";
 import InfoOutlinedIcon from "@mui/icons-material/InfoOutlined";
@@ -24,6 +24,7 @@ import StyleLegend from "./StyleLegend"; // 引入图例组件
 import { handleMapClickSelectFeatures as mapClickSelectFeatures, queryFeaturesByIds } from "@/utils/mapQueryService";
 import { useNotification } from "@refinedev/core";
 import { useChatToolActionHandler } from "@/hooks/useChatToolActionHandler";
+import { applyJunctionAreaRender } from "@components/olmap/DMALeakDetection/applyJunctionAreaRender";
 
 import { config } from "@/config/config";
 import { apiFetch } from "@/lib/apiFetch";
@@ -81,8 +82,16 @@ const Toolbar: React.FC<ToolbarProps> = ({
     startTime?: string;
     endTime?: string;
   } | null>(null);
+  const chatJunctionRenderCleanupRef = useRef<(() => void) | null>(null);
 
-  // Wire up chat tool actions (locate, view_history, view_scada)
+  const disposeChatJunctionRender = useCallback(() => {
+    chatJunctionRenderCleanupRef.current?.();
+    chatJunctionRenderCleanupRef.current = null;
+  }, []);
+
+  useEffect(() => () => disposeChatJunctionRender(), [disposeChatJunctionRender]);
+
+  // Wire up chat tool actions (locate, view_history, view_scada, render_junctions)
   useChatToolActionHandler(
     useCallback(
       (action) => {
@@ -161,9 +170,29 @@ const Toolbar: React.FC<ToolbarProps> = ({
             });
             break;
           }
+          case "render_junctions": {
+            disposeChatJunctionRender();
+
+            if (Object.keys(action.nodeAreaMap).length === 0) {
+              break;
+            }
+
+            if (map) {
+              chatJunctionRenderCleanupRef.current = applyJunctionAreaRender(
+                map,
+                {
+                  nodeAreaMap: action.nodeAreaMap,
+                  areaIds: action.areaIds,
+                  areaColors: action.areaColors,
+                },
+                { propertyKey: "chat_junction_render_index" },
+              );
+            }
+            break;
+          }
         }
       },
-      [map],
+      [disposeChatJunctionRender, map],
     ),
   );
 
diff --git a/src/store/chatToolStore.ts b/src/store/chatToolStore.ts
index c226489..5d44ecf 100644
--- a/src/store/chatToolStore.ts
+++ b/src/store/chatToolStore.ts
@@ -34,6 +34,12 @@ export type ChatToolAction =
       series?: Array<{ name: string; data: number[]; type?: "line" | "bar" }>;
       xAxisName?: string;
       yAxisName?: string;
+    }
+  | {
+      type: "render_junctions";
+      nodeAreaMap: Record<string, string>;
+      areaIds?: string[];
+      areaColors?: Record<string, string>;
     };
 
 interface ChatToolState {