diff --git a/src/main/java/com/techsor/datacenter/sender/service/TrendLogService.java b/src/main/java/com/techsor/datacenter/sender/service/TrendLogService.java
index 5e3467e..7b5a396 100644
--- a/src/main/java/com/techsor/datacenter/sender/service/TrendLogService.java
+++ b/src/main/java/com/techsor/datacenter/sender/service/TrendLogService.java
@@ -9,6 +9,7 @@ import com.techsor.datacenter.sender.dao.KingIOServerDAO;
 import com.techsor.datacenter.sender.dao.TypeDAO;
 import com.techsor.datacenter.sender.entitiy.DeviceEntity;
 import com.techsor.datacenter.sender.entitiy.kingio.*;
+import com.techsor.datacenter.sender.utils.RedisUtils;
 import com.techsor.datacenter.sender.utils.TimeUtils;
 import jakarta.annotation.Resource;
 import lombok.extern.slf4j.Slf4j;
@@ -28,6 +29,7 @@ import java.util.ArrayList;
 import java.util.Date;
 import java.util.List;
 import java.util.Map;
+import java.util.concurrent.TimeUnit;
 
 /**
  * 服务类，用于处理TrendLog的数据。
@@ -44,6 +46,8 @@ public class TrendLogService {
     KingIOServerDAO kingIOServerDAO;
     @Autowired
     private CommonOpt commonOpt;
+    @Autowired
+    private RedisUtils redisUtils;
 
     private final ObjectMapper objectMapper = new ObjectMapper();
     private SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.SSS");
@@ -102,6 +106,22 @@ public class TrendLogService {
             if (deviceItem==null){
                 continue;
             }
+            
+            boolean shouldProcess = true;
+            String redisKey = "trendLog_data_cache:" + data.getDeviceId() + ":" + dataItem.getTimestamp();
+            
+            // 1. Check if data exists in Redis cache (with error handling)
+            try {
+                if (redisUtils.hasKey(redisKey)) {
+                    log.info("TrendLog data exists in cache, skipping: deviceId={}, timestamp={}", data.getDeviceId(), dataItem.getTimestamp());
+                    DataSourceContextHolder.clearCurrentDataSourceKey();
+                    continue;
+                }
+            } catch (Exception e) {
+                log.warn("Failed to check Redis cache, continuing to process data: deviceId={}, timestamp={}, error={}", 
+                    data.getDeviceId(), dataItem.getTimestamp(), e.getMessage());
+            }
+            
             log.info("TrendLog process item:{},{},{}",data.getDeviceId(),dataItem.getLogData(),dataItem.getTimestamp());
             tempEntity.setDeviceId(deviceItem.getDeviceId());
             tempEntity.setContent(generateDBMStr(deviceItem,dataItem.getLogData()));
@@ -112,7 +132,17 @@ public class TrendLogService {
                 log.error("Received Time : "+dataItem.getTimestamp());
                 tempEntity.setTs("");
             }
+
             dbmValues.add(tempEntity);
+            
+            // 2. Write deviceId and timestamp to Redis cache with 30 minutes expiration (with error handling)
+            try {
+                redisUtils.add(redisKey, "1", 60, TimeUnit.MINUTES);
+                log.info("TrendLog data written to cache: key={}", redisKey);
+            } catch (Exception e) {
+                log.error("Failed to write to Redis cache, data would insert without dump remove: key={}, error={}", redisKey, e.getMessage());
+            }
+
             DataSourceContextHolder.clearCurrentDataSourceKey();
         }