diff --git a/fe/fe-core/src/main/java/org/apache/doris/datasource/ExternalCatalog.java b/fe/fe-core/src/main/java/org/apache/doris/datasource/ExternalCatalog.java
index 778c110df0bfac..76939d54e7a8d8 100644
--- a/fe/fe-core/src/main/java/org/apache/doris/datasource/ExternalCatalog.java
+++ b/fe/fe-core/src/main/java/org/apache/doris/datasource/ExternalCatalog.java
@@ -134,6 +134,9 @@ public abstract class ExternalCatalog
     protected Map<Long, ExternalDatabase<? extends ExternalTable>> idToDb = Maps.newConcurrentMap();
     @SerializedName(value = "lastUpdateTime")
     protected long lastUpdateTime;
+    @SerializedName(value = "comment")
+    private String comment;
+
     // db name does not contains "default_cluster"
     protected Map<String, Long> dbNameToId = Maps.newConcurrentMap();
     private boolean objectCreated = false;
@@ -142,7 +145,6 @@ public abstract class ExternalCatalog
     protected TransactionManager transactionManager;
 
     private ExternalSchemaCache schemaCache;
-    private String comment;
     // A cached and being converted properties for external catalog.
     // generated from catalog properties.
     private byte[] propLock = new byte[0];
diff --git a/fe/fe-core/src/test/java/org/apache/doris/datasource/ExternalCatalogTest.java b/fe/fe-core/src/test/java/org/apache/doris/datasource/ExternalCatalogTest.java
index 70e5e5f37af6cb..ebf69c6df52388 100644
--- a/fe/fe-core/src/test/java/org/apache/doris/datasource/ExternalCatalogTest.java
+++ b/fe/fe-core/src/test/java/org/apache/doris/datasource/ExternalCatalogTest.java
@@ -282,4 +282,38 @@ public void testSerialization() throws Exception {
             file.delete();
         }
     }
+
+    @Test
+    public void testSerializationWithComment() throws Exception {
+        MetaContext metaContext = new MetaContext();
+        metaContext.setMetaVersion(FeMetaVersion.VERSION_CURRENT);
+        metaContext.setThreadLocalInfo();
+
+        // 1. Write objects to file
+        File file = new File("./external_catalog_with_comment_test.dat");
+        file.createNewFile();
+        DataOutputStream dos = new DataOutputStream(Files.newOutputStream(file.toPath()));
+
+        TestExternalCatalog ctl = (TestExternalCatalog) mgr.getCatalog("test1");
+        String testComment = "This is a test comment for serialization";
+        ctl.setComment(testComment); // Set a custom comment value
+        ctl.write(dos);
+        dos.flush();
+        dos.close();
+
+        // 2. Read objects from file
+        DataInputStream dis = new DataInputStream(Files.newInputStream(file.toPath()));
+
+        String json = Text.readString(dis);
+        TestExternalCatalog ctl2 = GsonUtils.GSON.fromJson(json, TestExternalCatalog.class);
+        Configuration conf = ctl2.getConfiguration();
+        Assertions.assertNotNull(conf);
+
+        // Verify the comment is properly serialized and deserialized
+        Assertions.assertEquals(testComment, ctl2.getComment());
+
+        // 3. delete files
+        dis.close();
+        file.delete();
+    }
 }