diff --git a/src/models.py b/src/models.py
index ae5c08c..5fc1fe3 100644
--- a/src/models.py
+++ b/src/models.py
@@ -175,6 +175,22 @@ async def _create_tables(pool: aiomysql.Pool):
                 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4
             """)
 
+            # V2.0.3 迁移：为旧表补充波动测试参数字段
+            for col, col_def in [
+                ("FarTol", "INT DEFAULT 0 COMMENT '最远容差 cm'"),
+                ("NearTol", "INT DEFAULT 0 COMMENT '最近容差 cm'"),
+                ("StepTol", "INT DEFAULT 0 COMMENT '步进容差 cm'"),
+                ("BackForth", "INT DEFAULT 0 COMMENT '来回次数'"),
+                ("NearStay", "INT DEFAULT 0 COMMENT '最近停留时间 ms'"),
+                ("FarStay", "INT DEFAULT 0 COMMENT '最远停留时间 ms'"),
+            ]:
+                try:
+                    await cur.execute(
+                        f"ALTER TABLE `tb_fixture_param` ADD COLUMN `{col}` {col_def}"
+                    )
+                except Exception:
+                    pass  # 列已存在，忽略
+
             # 7. 车检器测试基准参数表
             await cur.execute("""
                 CREATE TABLE IF NOT EXISTS `tb_vechicle_base_test` (