diff --git a/edc-web/app/routes/fixture.py b/edc-web/app/routes/fixture.py
index c58df62..0333214 100644
--- a/edc-web/app/routes/fixture.py
+++ b/edc-web/app/routes/fixture.py
@@ -217,7 +217,9 @@ def api_get_serialnet(record_id):
 def api_get_fixture_param(dnt_id):
     """获取工装测试参数"""
     param = get_fixture_param(dnt_id)
-    return jsonify(param or {})
+    resp = jsonify(param or {})
+    resp.headers["Cache-Control"] = "no-store, no-cache, must-revalidate, max-age=0"
+    return resp
 
 
 @bp.route("/api/fixture/param/<int:dnt_id>", methods=["POST"])
diff --git a/edc-web/app/static/js/fixture.js b/edc-web/app/static/js/fixture.js
index 20221a3..43bebe0 100644
--- a/edc-web/app/static/js/fixture.js
+++ b/edc-web/app/static/js/fixture.js
@@ -196,7 +196,7 @@ function onCarChange() {
 
 async function loadFixtureParam() {
     try {
-        const resp = await fetch(`/api/fixture/param/${DNT_ID}`);
+        const resp = await fetch(`/api/fixture/param/${DNT_ID}?_=${Date.now()}`);
         const param = await resp.json();
         if (param && param.dnt_id) {
             fillFormFromParam(param);
@@ -239,7 +239,7 @@ function fillFormFromParam(param) {
 }
 
 async function refreshParams() {
-    const param = await (await fetch(`/api/fixture/param/${DNT_ID}`)).json();
+    const param = await (await fetch(`/api/fixture/param/${DNT_ID}?_=${Date.now()}`)).json();
     if (param && param.dnt_id) {
         fillFormFromParam(param);
         commLog('info', null, '已刷新：从数据库加载工装参数');
@@ -360,7 +360,7 @@ function startRespPolling(recordId, cmd) {
                     if (cmd === '4C') {
                         // 参数已在后端 upsert，直接从 DB 加载
                         setTimeout(async () => {
-                            const p = await (await fetch(`/api/fixture/param/${DNT_ID}`)).json();
+                            const p = await (await fetch(`/api/fixture/param/${DNT_ID}?_=${Date.now()}`)).json();
                             if (p && p.dnt_id) fillFormFromParam(p);
                         }, 500);
                     }
diff --git a/edc-web/app/static/js/test_op.js b/edc-web/app/static/js/test_op.js
index 171f2cb..d626a28 100644
--- a/edc-web/app/static/js/test_op.js
+++ b/edc-web/app/static/js/test_op.js
@@ -275,7 +275,7 @@ async function pollProgress() {
 
 async function loadTestMode() {
     try {
-        const resp = await fetch(`/api/fixture/param/${DNT_ID}`);
+        const resp = await fetch(`/api/fixture/param/${DNT_ID}?_=${Date.now()}`);
         const param = await resp.json();
         if (param && param.dnt_id) {
             updateTestModeUI(param.TestMode);