diff --git a/src/storage/blocksstable/ob_lob_data_writer.cpp b/src/storage/blocksstable/ob_lob_data_writer.cpp
index 2bb145bc89af1c9b5c5615fd29c61fee7cf0386a..d68c3caea75f5febfca1ce542a64091754204cd9 100644
--- a/src/storage/blocksstable/ob_lob_data_writer.cpp
+++ b/src/storage/blocksstable/ob_lob_data_writer.cpp
@@ -739,7 +739,9 @@ int ObLobDataWriter::check_rowkey(const ObStoreRowkey& rowkey, bool& check_ret)
   } else {
     check_ret = true;
     for (int64_t i = 0; check_ret && i < rowkey_column_cnt_; i++) {
-      if (column_types_.at(i).get_type() != rowkey.get_obj_ptr()[i].get_type()) {
+      if (rowkey.get_obj_ptr()[i].is_null()) {
+        // pass
+      } else if (column_types_.at(i).get_type() != rowkey.get_obj_ptr()[i].get_type()) {
         check_ret = false;
       }
     }