diff --git a/src/main/java/com/xydl/cac/iec/IEDCollectService.java b/src/main/java/com/xydl/cac/iec/IEDCollectService.java
index 3478468..3014469 100644
--- a/src/main/java/com/xydl/cac/iec/IEDCollectService.java
+++ b/src/main/java/com/xydl/cac/iec/IEDCollectService.java
@@ -1,5 +1,6 @@
 package com.xydl.cac.iec;
 
+import com.beanit.iec61850bean.BasicDataAttribute;
 import com.xydl.cac.entity.*;
 import com.xydl.cac.repository.IcdConfigTypeAttRepository;
 import com.xydl.cac.repository.IcdConfigTypeInstRepository;
@@ -26,6 +27,7 @@ public class IEDCollectService {
     WebSocketServer _webSocketServer;
 
     public static HashMap<Integer, HashMap<String, String>> lastDataMap = new HashMap<>();
+    public static HashMap<String, String> relationMap = new HashMap<>();
 
     public IEDCollectService(IcdConfigTypeRepository configRepository, IcdConfigTypeAttRepository attRepository,
                              IcdConfigTypeInstRepository instRepository, RptparamindexRepository rptparamindexRepository,
@@ -99,13 +101,16 @@ public class IEDCollectService {
         time = time.replace("T", " ").replace("Z", "").replace("z", "");
         _dataService.insertData(rpt.getTablename(), rpt.getEqmid(), time, rpt.getColname(), value);
 
-        HashMap<String, String> map = lastDataMap.get(rpt.getEqmid());
-        if (map == null) {
-            map = new HashMap<>();
-            lastDataMap.put(rpt.getEqmid(), map);
-        }
-        map.put(rpt.getColname(), value);
-        map.put("acquisitionTime", time);
+        // 更新最新数据缓存
+        updateLastData(rpt.getEqmid(), rpt.getColname(), value, time);
+
+        // 更新关联关系缓存
+        String key = paramindexNew + "_" + fc;
+        value = rpt.getEqmid() + "," + rpt.getColname();
+        relationMap.put(key, value);
+        key = paramindexT + "_" + fc;
+        value = rpt.getEqmid() + ",acquisitionTime";
+        relationMap.put(key, value);
     }
 
     private Rptparamindex findRpt(List<Rptparamindex> rptList, String paramindex) {
@@ -116,4 +121,35 @@ public class IEDCollectService {
         }
         return null;
     }
+
+    public static void updateLastData(Integer eqmid, String colname, String value, String time) {
+        HashMap<String, String> map = lastDataMap.get(eqmid);
+        if (map == null) {
+            map = new HashMap<>();
+            lastDataMap.put(eqmid, map);
+        }
+        map.put(colname, value);
+        if (time != null) {
+            map.put("acquisitionTime", time);
+        }
+    }
+
+    public static void updateLastData(BasicDataAttribute bda) {
+        try {
+            String ref = bda.getReference().toString();
+            String key = ref + "_" + bda.getFc().toString();
+            if (IEDCollectService.relationMap.containsKey(key)) {
+                String value = IEDCollectService.relationMap.get(key);
+                String[] str = value.split(",");
+                Integer eqmid = Integer.parseInt(str[0]);
+                String colname = str[1];
+                value = bda.getValueString();
+                if ("acquisitionTime".equals(colname)) {
+                    value = value.replace("T", " ").replace("Z", "").replace("z", "");
+                }
+                updateLastData(eqmid, colname, value, null);
+            }
+        } catch (Exception ignore) {
+        }
+    }
 }
diff --git a/src/main/java/com/xydl/cac/iec/RealTimeDataService.java b/src/main/java/com/xydl/cac/iec/RealTimeDataService.java
index 315b204..9f79ec1 100644
--- a/src/main/java/com/xydl/cac/iec/RealTimeDataService.java
+++ b/src/main/java/com/xydl/cac/iec/RealTimeDataService.java
@@ -135,5 +135,6 @@ public class RealTimeDataService {
         if (iecServer != null) {
             iecServer.updateBda(bda);
         }
+        IEDCollectService.updateLastData(bda);
     }
 }