diff --git a/src/share/ob_unit_getter.h b/src/share/ob_unit_getter.h
index c4d36608f5..4d688c93d8 100644
--- a/src/share/ob_unit_getter.h
+++ b/src/share/ob_unit_getter.h
@@ -51,6 +51,9 @@ public:
     return UNIT_DELETING_IN_OBSERVER != status && UNIT_ERROR_STAT != status;
   }
 
+  static bool is_unit_will_be_deleted_in_observer(const ObUnitStatus status) {
+    return UNIT_WAIT_GC_IN_OBSERVER == status || UNIT_DELETING_IN_OBSERVER == status; }
+
   struct ObTenantConfig
   {
     OB_UNIS_VERSION(1);
diff --git a/src/storage/high_availability/ob_ls_complete_migration.cpp b/src/storage/high_availability/ob_ls_complete_migration.cpp
index f11ecbefe6..56e6ed1b87 100644
--- a/src/storage/high_availability/ob_ls_complete_migration.cpp
+++ b/src/storage/high_availability/ob_ls_complete_migration.cpp
@@ -362,8 +362,7 @@ int ObLSCompleteMigrationDagNet::update_migration_status_(ObLS *ls)
   static const int64_t UPDATE_MIGRATION_STATUS_INTERVAL_MS = 100 * 1000; //100ms
   ObTenantDagScheduler *scheduler = nullptr;
   int32_t result = OB_SUCCESS;
-  share::ObTenantBase *tenant_base = MTL_CTX();
-  omt::ObTenant *tenant = nullptr;
+  bool is_tenant_deleted = false;
 
   DEBUG_SYNC(BEFORE_COMPLETE_MIGRATION_UPDATE_STATUS);
 
@@ -376,10 +375,6 @@ int ObLSCompleteMigrationDagNet::update_migration_status_(ObLS *ls)
   } else if (OB_ISNULL(scheduler = MTL(ObTenantDagScheduler*))) {
     ret = OB_ERR_UNEXPECTED;
     LOG_WARN("failed to get ObTenantDagScheduler from MTL", K(ret));
-  } else if (OB_ISNULL(tenant_base)) {
-    ret = OB_ERR_UNEXPECTED;
-    LOG_WARN("tenant base should not be NULL", K(ret), KP(tenant_base));
-  } else if (FALSE_IT(tenant = static_cast<omt::ObTenant *>(tenant_base))) {
   } else {
     while (!is_finish) {
       ObMigrationStatus current_migration_status = ObMigrationStatus::OB_MIGRATION_STATUS_MAX;
@@ -404,7 +399,9 @@ int ObLSCompleteMigrationDagNet::update_migration_status_(ObLS *ls)
         ret = OB_SERVER_IS_STOPPING;
         LOG_WARN("tenant dag scheduler has set stop, stop migration dag net", K(ret), K(ctx_));
         break;
-      } else if (tenant->has_stopped()) {
+      } else if (OB_FAIL(ObStorageHAUtils::check_tenant_will_be_deleted(is_tenant_deleted))) {
+        LOG_WARN("failed to check tenant deleted", K(ret), K(ctx_));
+      } else if (is_tenant_deleted) {
         ret = OB_TENANT_HAS_BEEN_DROPPED;
         LOG_WARN("tenant has been stopped, stop migration dag net", K(ret), K(ctx_));
         break;
diff --git a/src/storage/high_availability/ob_storage_ha_struct.cpp b/src/storage/high_availability/ob_storage_ha_struct.cpp
index 9547a8046c..ff12a29862 100644
--- a/src/storage/high_availability/ob_storage_ha_struct.cpp
+++ b/src/storage/high_availability/ob_storage_ha_struct.cpp
@@ -547,10 +547,17 @@ int ObMigrationStatusHelper::check_ls_with_transfer_task_(
   SCN max_decided_scn(SCN::base_scn());
   ObLSService *ls_service = NULL;
   ObLSHandle dest_ls_handle;
+  bool is_tenant_deleted = false;
 
   if (OB_ISNULL(sql_proxy)) {
     ret = OB_ERR_UNEXPECTED;
     LOG_WARN("mysql proxy should not be NULL", K(ret), KP(sql_proxy));
+  } else if (OB_FAIL(ObStorageHAUtils::check_tenant_will_be_deleted(is_tenant_deleted))) {
+    LOG_WARN("failed to check tenant deleted", K(ret), K(ls));
+  } else if (is_tenant_deleted) {
+    need_check_allow_gc = true;
+    need_wait_dest_ls_replay = false;
+    FLOG_INFO("unit wait gc in observer, allow gc", K(tenant_id), K(src_ls_id));
   } else if (OB_FAIL(ObTransferTaskOperator::get_by_src_ls(
       *sql_proxy, tenant_id, src_ls_id, task, share::OBCG_STORAGE))) {
     LOG_WARN("failed to get transfer task", K(ret), K(tenant_id), K(src_ls_id));
diff --git a/src/storage/high_availability/ob_storage_ha_utils.cpp b/src/storage/high_availability/ob_storage_ha_utils.cpp
index 9a3735cacb..f3198fcaa1 100644
--- a/src/storage/high_availability/ob_storage_ha_utils.cpp
+++ b/src/storage/high_availability/ob_storage_ha_utils.cpp
@@ -417,6 +417,27 @@ int ObStorageHAUtils::check_ls_is_leader(
   return ret;
 }
 
+int ObStorageHAUtils::check_tenant_will_be_deleted(
+    bool &is_deleted)
+{
+  int ret = OB_SUCCESS;
+  is_deleted = false;
+
+  share::ObTenantBase *tenant_base = MTL_CTX();
+  omt::ObTenant *tenant = nullptr;
+  ObUnitInfoGetter::ObUnitStatus unit_status;
+  if (OB_ISNULL(tenant_base)) {
+    ret = OB_ERR_UNEXPECTED;
+    LOG_WARN("tenant base should not be NULL", K(ret), KP(tenant_base));
+  } else if (FALSE_IT(tenant = static_cast<omt::ObTenant *>(tenant_base))) {
+  } else if (FALSE_IT(unit_status = tenant->get_unit_status())) {
+  } else if (ObUnitInfoGetter::is_unit_will_be_deleted_in_observer(unit_status)) {
+    is_deleted = true;
+    FLOG_INFO("unit wait gc in observer, allow gc", K(tenant->id()), K(unit_status));
+  }
+  return ret;
+}
+
 bool ObTransferUtils::is_need_retry_error(const int err)
 {
   bool bool_ret = false;
diff --git a/src/storage/high_availability/ob_storage_ha_utils.h b/src/storage/high_availability/ob_storage_ha_utils.h
index 7173098b91..8261820d57 100644
--- a/src/storage/high_availability/ob_storage_ha_utils.h
+++ b/src/storage/high_availability/ob_storage_ha_utils.h
@@ -50,6 +50,8 @@ public:
 
   static int calc_tablet_sstable_macro_block_cnt(
       const ObTabletHandle &tablet_handle, int64_t &data_macro_block_count);
+  static int check_tenant_will_be_deleted(
+      bool &is_deleted);
 
 private:
   static int check_merge_error_(const uint64_t tenant_id, common::ObISQLClient &sql_client);