diff --git a/tdenginewriter/src/main/java/com/alibaba/datax/plugin/writer/tdenginewriter/DefaultDataHandler.java b/tdenginewriter/src/main/java/com/alibaba/datax/plugin/writer/tdenginewriter/DefaultDataHandler.java
index 84adaf72..27ade382 100644
--- a/tdenginewriter/src/main/java/com/alibaba/datax/plugin/writer/tdenginewriter/DefaultDataHandler.java
+++ b/tdenginewriter/src/main/java/com/alibaba/datax/plugin/writer/tdenginewriter/DefaultDataHandler.java
@@ -307,6 +307,8 @@ public class DefaultDataHandler implements DataHandler {
                 if (colMeta.type.equals("TIMESTAMP"))
                     return "\"" + column.asString() + "\"";
                 String value = column.asString();
+                if (value == null)
+                    return "NULL";
                 return "\'" + Utils.escapeSingleQuota(value) + "\'";
             case NULL:
             case BAD: