diff --git a/das/src/main/java/com/das/modules/node/service/TDEngineService.java b/das/src/main/java/com/das/modules/node/service/TDEngineService.java
index 51c33b95..2f805a8a 100644
--- a/das/src/main/java/com/das/modules/node/service/TDEngineService.java
+++ b/das/src/main/java/com/das/modules/node/service/TDEngineService.java
@@ -426,6 +426,9 @@ public class TDEngineService {
         }
         Map<String, Map<String, Map<String, Object>>> result = new HashMap<>();
         Map<String, Map<String, Object>> valueMap = new HashMap<>();
+        for (String item : fieldList){
+            valueMap.put(item,null);
+        }
         StringBuffer sb = new StringBuffer(2048);
         if (StrUtil.isNotBlank(interval)) {
             String startTimeStr = SIMPLE_DATE_FORMAT.format(startTime);