diff --git a/platform-dal/src/main/java/com/lyms/platform/query/AntExRecordQuery.java b/platform-dal/src/main/java/com/lyms/platform/query/AntExRecordQuery.java
index f7f5980..34e7ba9 100644
--- a/platform-dal/src/main/java/com/lyms/platform/query/AntExRecordQuery.java
+++ b/platform-dal/src/main/java/com/lyms/platform/query/AntExRecordQuery.java
@@ -168,7 +168,11 @@ public class AntExRecordQuery extends BaseQuery implements IConvertToNativeQuery
         }
 
         if (null != dueDateStart) {
-            c = Criteria.where("dueDate").gte(dueDateStart);
+            if (null != c) {
+                c = c.and("dueDate").gte(dueDateStart);
+            } else {
+                c = Criteria.where("dueDate").gte(dueDateStart);
+            }
         }
 
         if (null != dueDateEnd) {