diff --git a/backend/src/main/resources/db/migration/V39__test_case_node_add_pos.sql b/backend/src/main/resources/db/migration/V39__test_case_node_add_pos.sql
new file mode 100644
index 0000000000..36978c314a
--- /dev/null
+++ b/backend/src/main/resources/db/migration/V39__test_case_node_add_pos.sql
@@ -0,0 +1,58 @@
+alter table test_case_node add pos double null;
+
+DROP PROCEDURE IF EXISTS pos_cursor;
+DELIMITER //
+CREATE PROCEDURE pos_cursor()
+BEGIN
+    DECLARE projectId VARCHAR(64);
+    DECLARE nodeId VARCHAR(64);
+    DECLARE pos DOUBLE;
+    DECLARE level INT;
+    DECLARE done INT DEFAULT 0;
+    DECLARE cursor1 CURSOR FOR (SELECT DISTINCT project_id
+                                FROM test_case_node
+                                WHERE pos IS NULL);
+    DECLARE cursor2 CURSOR FOR (select id
+                                from test_case_node
+                                where project_id = projectId
+                                  and test_case_node.level = level
+                                order by create_time);
+    DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = TRUE;
+    OPEN cursor1;
+    outer_loop:
+    LOOP
+        FETCH cursor1 INTO projectId;
+        IF done
+        THEN
+            LEAVE outer_loop;
+        END IF;
+        SET level = 1;
+        select max(test_case_node.level) into @max_level from test_case_node where project_id = projectId;
+        while level <= @max_level
+            do
+                set pos = 65536;
+                OPEN cursor2;
+                inner_loop:
+                LOOP
+                    FETCH cursor2 INTO nodeId;
+                    IF done
+                    THEN
+                        LEAVE inner_loop;
+                    END IF;
+                    UPDATE test_case_node
+                    SET test_case_node.pos = pos
+                    WHERE id = nodeId;
+                    SET pos = pos + 65536;
+                END LOOP;
+                SET done = 0;
+                CLOSE cursor2;
+                set level = level + 1;
+            end while;
+
+    END LOOP;
+    CLOSE cursor1;
+END //
+DELIMITER ;
+
+CALL pos_cursor();
+DROP PROCEDURE IF EXISTS pos_cursor;
\ No newline at end of file