diff --git a/fe/fe-core/src/main/java/org/apache/doris/catalog/TableProperty.java b/fe/fe-core/src/main/java/org/apache/doris/catalog/TableProperty.java
index 860d404cd0..05cd52f064 100644
--- a/fe/fe-core/src/main/java/org/apache/doris/catalog/TableProperty.java
+++ b/fe/fe-core/src/main/java/org/apache/doris/catalog/TableProperty.java
@@ -270,7 +270,7 @@ public class TableProperty implements Writable {
 
     public boolean getEnableUniqueKeyMergeOnWrite() {
         return Boolean.parseBoolean(properties.getOrDefault(
-                PropertyAnalyzer.ENABLE_UNIQUE_KEY_MERGE_ON_WRITE, "false"));
+                PropertyAnalyzer.ENABLE_UNIQUE_KEY_MERGE_ON_WRITE, "true"));
     }
 
     public void setSequenceMapCol(String colName) {