diff --git a/yudao-module-iot/yudao-module-iot-biz/src/main/java/cn/iocoder/yudao/module/iot/service/device/TDengineService.java b/yudao-module-iot/yudao-module-iot-biz/src/main/java/cn/iocoder/yudao/module/iot/service/device/TDengineService.java
index 4e8f5bc43..143c59fec 100644
--- a/yudao-module-iot/yudao-module-iot-biz/src/main/java/cn/iocoder/yudao/module/iot/service/device/TDengineService.java
+++ b/yudao-module-iot/yudao-module-iot-biz/src/main/java/cn/iocoder/yudao/module/iot/service/device/TDengineService.java
@@ -1167,7 +1167,7 @@ public class TDengineService {
         }
 
         // 默认限制条数（防止全表扫描）
-        int safeLimit = limit == null ? 100 : limit;
+//        int safeLimit = limit == null ? 100 : limit;
 
         String tableName = "besure_server.d_" + deviceId;
 
@@ -1182,7 +1182,10 @@ public class TDengineService {
         }
 
         sqlBuilder.append(" ORDER BY ts DESC "); // 按时间倒序
-        sqlBuilder.append(" LIMIT ").append(safeLimit); // 限制条数
+
+        if(limit !=null ){
+            sqlBuilder.append(" LIMIT ").append(limit); // 限制条数
+        }
 
         String sql = sqlBuilder.toString();