diff --git a/flink-cdc-connect/flink-cdc-pipeline-connectors/flink-cdc-pipeline-connector-doris/src/main/java/org/apache/flink/cdc/connectors/doris/sink/DorisMetadataApplier.java b/flink-cdc-connect/flink-cdc-pipeline-connectors/flink-cdc-pipeline-connector-doris/src/main/java/org/apache/flink/cdc/connectors/doris/sink/DorisMetadataApplier.java
index 57b3d22aba..a16913c815 100644
--- a/flink-cdc-connect/flink-cdc-pipeline-connectors/flink-cdc-pipeline-connector-doris/src/main/java/org/apache/flink/cdc/connectors/doris/sink/DorisMetadataApplier.java
+++ b/flink-cdc-connect/flink-cdc-pipeline-connectors/flink-cdc-pipeline-connector-doris/src/main/java/org/apache/flink/cdc/connectors/doris/sink/DorisMetadataApplier.java
@@ -268,8 +268,7 @@ private void applyAlterColumnTypeEvent(AlterColumnTypeEvent event)
                         new FieldSchema(
                                 entry.getKey(),
                                 buildTypeString(entry.getValue()),
-                                columnDefaultValueMapping.get(
-                                        columnDefaultValueMapping.get(entry.getKey())),
+                                columnDefaultValueMapping.get(entry.getKey()),
                                 null));
             }
         } catch (Exception e) {