diff --git a/fe/fe-core/src/main/java/org/apache/doris/alter/Alter.java b/fe/fe-core/src/main/java/org/apache/doris/alter/Alter.java
index e01d464f26..edc038e75b 100644
--- a/fe/fe-core/src/main/java/org/apache/doris/alter/Alter.java
+++ b/fe/fe-core/src/main/java/org/apache/doris/alter/Alter.java
@@ -901,7 +901,7 @@ public class Alter {
             Database db = Env.getCurrentInternalCatalog().getDbOrDdlException(tbl.getDb());
             mtmv = (MTMV) db.getTableOrMetaException(tbl.getTbl(), TableType.MATERIALIZED_VIEW);
 
-            mtmv.writeLock();
+            mtmv.writeMvLock();
             switch (alterMTMV.getOpType()) {
                 case ALTER_REFRESH_INFO:
                     mtmv.alterRefreshInfo(alterMTMV.getRefreshInfo());
@@ -930,7 +930,7 @@ public class Alter {
             LOG.warn(e);
         } finally {
             if (mtmv != null) {
-                mtmv.writeUnlock();
+                mtmv.writeMvUnlock();
             }
         }
     }