diff --git a/edc-web/app/models.py b/edc-web/app/models.py
index 42087a3..85b1048 100644
--- a/edc-web/app/models.py
+++ b/edc-web/app/models.py
@@ -149,11 +149,12 @@ def get_latest_test_state(dnt_id: int) -> dict | None:
         conn.close()
 
 
-def get_test_data(page: int = 1, per_page: int = 20,
+def get_test_data(page: int = 1, per_page: int = 100,
                   serial: str = "", date_from: str = "",
                   date_to: str = "", test_mode: str = "",
-                  data_source: str = "") -> tuple[list[dict], int]:
-    """分页查询测试数据（JOIN dnt_info），返回 (records, total)
+                  data_source: str = "",
+                  detector_serial: str = "") -> tuple[list[dict], int]:
+    """分页查询测试数据（JOIN dnt_info），最多返回最近 6000 条，返回 (records, total)
 
     test_mode: ''=全部, '0'=灵敏度, '1'=波动
     data_source: ''=全部, 'B2', 'B4'
@@ -166,6 +167,9 @@ def get_test_data(page: int = 1, per_page: int = 20,
             if serial:
                 where.append("d.serial LIKE %s")
                 params.append(f"%{serial}%")
+            if detector_serial:
+                where.append("t.detector_serial LIKE %s")
+                params.append(f"%{detector_serial}%")
             if date_from:
                 where.append("t.create_time >= %s")
                 params.append(date_from if len(date_from) > 10 else date_from)
@@ -181,17 +185,21 @@ def get_test_data(page: int = 1, per_page: int = 20,
 
             where_clause = " AND ".join(where) if where else "1=1"
 
-            # count
+            # count — 最多 6000 条
             cur.execute(
-                f"SELECT COUNT(*) as total FROM tb_state_tst t "
-                f"JOIN dnt_info d ON t.dnt_id = d.id WHERE {where_clause}",
+                f"SELECT COUNT(*) as total FROM ("
+                f"SELECT 1 FROM tb_state_tst t "
+                f"JOIN dnt_info d ON t.dnt_id = d.id "
+                f"WHERE {where_clause} ORDER BY t.id DESC LIMIT 6000"
+                f") sub",
                 params,
             )
             total = cur.fetchone()["total"]
 
-            # data
+            # data — 子查询限 6000 后再分页
             offset = (page - 1) * per_page
             cur.execute(
+                f"SELECT * FROM ("
                 f"SELECT t.*, d.serial, "
                 f"c.coil_num, c.name as coil_name, "
                 f"sc.simulate_num, sc.name as car_name "
@@ -200,7 +208,8 @@ def get_test_data(page: int = 1, per_page: int = 20,
                 f"LEFT JOIN tb_coil_info c ON t.coil_id = c.id "
                 f"LEFT JOIN tb_simulate_car sc ON t.simulate_car_id = sc.id "
                 f"WHERE {where_clause} "
-                f"ORDER BY t.id DESC LIMIT %s OFFSET %s",
+                f"ORDER BY t.id DESC LIMIT 6000"
+                f") sub ORDER BY id DESC LIMIT %s OFFSET %s",
                 params + [per_page, offset],
             )
             records = cur.fetchall()
@@ -212,8 +221,9 @@ def get_test_data(page: int = 1, per_page: int = 20,
 
 def get_all_test_data_for_export(serial: str = "", date_from: str = "",
                                  date_to: str = "", test_mode: str = "",
-                                 data_source: str = "") -> list[dict]:
-    """导出全部数据
+                                 data_source: str = "",
+                                 detector_serial: str = "") -> list[dict]:
+    """导出全部数据（最多最近 6000 条）
 
     test_mode: ''=全部, '0'=灵敏度, '1'=波动
     data_source: ''=全部, 'B2', 'B4'
@@ -226,6 +236,9 @@ def get_all_test_data_for_export(serial: str = "", date_from: str = "",
             if serial:
                 where.append("d.serial LIKE %s")
                 params.append(f"%{serial}%")
+            if detector_serial:
+                where.append("t.detector_serial LIKE %s")
+                params.append(f"%{detector_serial}%")
             if date_from:
                 where.append("t.create_time >= %s")
                 params.append(date_from if len(date_from) > 10 else date_from)
@@ -248,7 +261,7 @@ def get_all_test_data_for_export(serial: str = "", date_from: str = "",
                 f"JOIN dnt_info d ON t.dnt_id = d.id "
                 f"LEFT JOIN tb_coil_info c ON t.coil_id = c.id "
                 f"LEFT JOIN tb_simulate_car sc ON t.simulate_car_id = sc.id "
-                f"WHERE {where_clause} ORDER BY t.id DESC",
+                f"WHERE {where_clause} ORDER BY t.id DESC LIMIT 6000",
                 params,
             )
             return cur.fetchall()
diff --git a/edc-web/app/routes/test_data.py b/edc-web/app/routes/test_data.py
index 3cb8862..cc42ef4 100644
--- a/edc-web/app/routes/test_data.py
+++ b/edc-web/app/routes/test_data.py
@@ -21,15 +21,16 @@ def test_data_page():
 def api_test_data():
     """分页查询测试数据"""
     page = request.args.get("page", 1, type=int)
-    per_page = request.args.get("per_page", 20, type=int)
+    per_page = request.args.get("per_page", 100, type=int)
     serial = request.args.get("serial", "", type=str)
+    detector_serial = request.args.get("detector_serial", "", type=str)
     date_from = request.args.get("date_from", "", type=str)
     date_to = request.args.get("date_to", "", type=str)
     test_mode = request.args.get("test_mode", "", type=str)
     data_source = request.args.get("data_source", "", type=str)
 
     records, total = get_test_data(page, per_page, serial, date_from, date_to,
-                                   test_mode, data_source)
+                                   test_mode, data_source, detector_serial)
     return jsonify({
         "records": records,
         "total": total,
@@ -42,29 +43,33 @@ def api_test_data():
 @bp.route("/api/test-data/chart")
 @login_required
 def api_chart_data():
-    """返回图表所需全部数据（不分页）"""
+    """返回图表所需全部数据（不分页，最多 6000 条）"""
     serial = request.args.get("serial", "", type=str)
+    detector_serial = request.args.get("detector_serial", "", type=str)
     date_from = request.args.get("date_from", "", type=str)
     date_to = request.args.get("date_to", "", type=str)
     test_mode = request.args.get("test_mode", "", type=str)
     data_source = request.args.get("data_source", "", type=str)
 
     records = get_all_test_data_for_export(serial, date_from, date_to,
-                                           test_mode, data_source)
+                                           test_mode, data_source,
+                                           detector_serial)
     return jsonify({"records": records, "total": len(records)})
 
 @bp.route("/api/test-data/export")
 @login_required
 def api_export():
-    """导出测试数据为 CSV"""
+    """导出测试数据为 CSV（最多 6000 条）"""
     serial = request.args.get("serial", "", type=str)
+    detector_serial = request.args.get("detector_serial", "", type=str)
     date_from = request.args.get("date_from", "", type=str)
     date_to = request.args.get("date_to", "", type=str)
     test_mode = request.args.get("test_mode", "", type=str)
     data_source = request.args.get("data_source", "", type=str)
 
     records = get_all_test_data_for_export(serial, date_from, date_to,
-                                           test_mode, data_source)
+                                           test_mode, data_source,
+                                           detector_serial)
 
     output = io.StringIO()
     writer = csv.writer(output)
diff --git a/edc-web/app/static/js/test_data.js b/edc-web/app/static/js/test_data.js
index b9af44a..4be9060 100644
--- a/edc-web/app/static/js/test_data.js
+++ b/edc-web/app/static/js/test_data.js
@@ -28,12 +28,11 @@ const VIEWS = {
         label: '全部数据',
         data_source: '',          // '' = 不过滤
         cols: [
-            { key: 'id',            title: 'ID' },
-            { key: 'serial',        title: '设备编码' },
+            { key: 'create_time',   title: '时间',      render: r => fmtTime(r.create_time) },
+            { key: 'serial',        title: '设备编码',  render: r => (r.serial || '').slice(-6) },
             { key: 'detector_serial', title: '车检器序列号', render: r => r.detector_serial || '-' },
             { key: 'model',         title: '型号',      render: r => getDevTypeName(r.sub_type) },
             { key: 'data_source',   title: '来源' },
-            { key: 'test_mode',     title: '测试模式',   render: r => r.test_mode === 1 ? '波动' : '灵敏度' },
             { key: 'iffinish',      title: '完成',       render: r => r.data_source === 'B4' ? '-' : (r.iffinish === '1' ? '是' : '否') },
             { key: 'fault_info',    title: '故障信息',   render: r => r.data_source === 'B4' ? '-' : `<span style="display:inline-block;max-width:12em;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;" title="${escHtml(r.fault_info || '')}">${escHtml(r.fault_info || '-')}</span>` },
             { key: 'relay_out',     title: '继电器',    render: r => fmtRelay(r.relay_out) },
@@ -58,18 +57,17 @@ const VIEWS = {
             { key: 'near_dist',     title: '最近距离(mm)', render: r => r.data_source === 'B2' ? '-' : (r.near_dist != null ? r.near_dist + ' ' : '-') },
             { key: 'far_dist',      title: '最远距离(mm)', render: r => r.data_source === 'B2' ? '-' : (r.far_dist != null ? r.far_dist + ' ' : '-') },
             { key: 'env',           title: '测试环境',  render: r => envLabel(r) },
-            { key: 'create_time',   title: '时间',      render: r => fmtTime(r.create_time) },
+            { key: 'test_mode',     title: '测试模式',   render: r => r.test_mode === 1 ? '波动' : '灵敏度' },
         ],
     },
     b2: {
         label: '灵敏度测试',
         data_source: 'B2',
         cols: [
-            { key: 'id',            title: 'ID' },
-            { key: 'serial',        title: '设备编码' },
+            { key: 'create_time',   title: '时间',      render: r => fmtTime(r.create_time) },
+            { key: 'serial',        title: '设备编码',  render: r => (r.serial || '').slice(-6) },
             { key: 'detector_serial', title: '车检器序列号', render: r => r.detector_serial || '-' },
             { key: 'model',         title: '型号',      render: r => getDevTypeName(r.sub_type) },
-            { key: 'test_mode',     title: '测试模式',   render: r => r.test_mode === 1 ? '波动' : '灵敏度' },
             { key: 'iffinish',      title: '完成',       render: r => r.iffinish === '1' ? '是' : '否' },
             { key: 'fault_info',    title: '故障信息',   render: r => `<span style="display:inline-block;max-width:12em;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;" title="${escHtml(r.fault_info || '')}">${escHtml(r.fault_info || '-')}</span>` },
             { key: 'relay_out',     title: '继电器',    render: r => fmtRelay(r.relay_out) },
@@ -82,15 +80,15 @@ const VIEWS = {
             { key: 'enter_speed',   title: '触发速度',   render: r => toSpeed(r.enter_speed) },
             { key: 'exit_speed',    title: '释放速度',   render: r => toSpeed(r.exit_speed) },
             { key: 'env',           title: '测试环境',  render: r => envLabel(r) },
-                        { key: 'create_time',   title: '时间',      render: r => fmtTime(r.create_time) },
+            { key: 'test_mode',     title: '测试模式',   render: r => r.test_mode === 1 ? '波动' : '灵敏度' },
         ],
     },
     b4: {
         label: '波动测试',
         data_source: 'B4',
         cols: [
-            { key: 'id',            title: 'ID' },
-            { key: 'serial',        title: '设备编码' },
+            { key: 'create_time',   title: '时间',      render: r => fmtTime(r.create_time) },
+            { key: 'serial',        title: '设备编码',  render: r => (r.serial || '').slice(-6) },
             { key: 'detector_serial', title: '车检器序列号', render: r => r.detector_serial || '-' },
             { key: 'remain_count',  title: '剩余次数' },
             { key: 'work_freq',     title: '工作频率(Hz)' },
@@ -102,7 +100,7 @@ const VIEWS = {
             { key: 'b4_leave_dist', title: '释放高度(mm)' },
             { key: 'relay_out',     title: '继电器',    render: r => fmtRelay(r.relay_out) },
             { key: 'env',           title: '测试环境',  render: r => envLabel(r) },
-                        { key: 'create_time',   title: '时间',      render: r => fmtTime(r.create_time) },
+            { key: 'test_mode',     title: '测试模式',   render: r => r.test_mode === 1 ? '波动' : '灵敏度' },
         ],
     },
 };
@@ -193,14 +191,16 @@ function getDatetime(dateId, timeId) {
 async function searchData(page = 1) {
     currentPage = page;
     const serial = document.getElementById("search-serial").value;
+    const detectorSerial = document.getElementById("search-detector-serial").value;
     const dateFrom = getDatetime("search-date-from", "search-time-from");
     const dateTo = getDatetime("search-date-to", "search-time-to");
     const v = VIEWS[currentView];
 
-    const perPage = parseInt(document.getElementById("per-page").value) || 20;
+    const perPage = parseInt(document.getElementById("per-page").value) || 100;
 
     const params = new URLSearchParams({ page, per_page: perPage });
     if (serial) params.set("serial", serial);
+    if (detectorSerial) params.set("detector_serial", detectorSerial);
     if (dateFrom) params.set("date_from", dateFrom);
     if (dateTo) params.set("date_to", dateTo);
     // 按 data_source 过滤（全部不过滤）
@@ -271,12 +271,14 @@ function renderPagination() {
 
 function exportCSV() {
     const serial = document.getElementById("search-serial").value;
+    const detectorSerial = document.getElementById("search-detector-serial").value;
     const dateFrom = getDatetime("search-date-from", "search-time-from");
     const dateTo = getDatetime("search-date-to", "search-time-to");
     const v = VIEWS[currentView];
 
     const params = new URLSearchParams();
     if (serial) params.set("serial", serial);
+    if (detectorSerial) params.set("detector_serial", detectorSerial);
     if (dateFrom) params.set("date_from", dateFrom);
     if (dateTo) params.set("date_to", dateTo);
     if (v.data_source) params.set("data_source", v.data_source);
@@ -364,6 +366,7 @@ async function loadChart() {
     if (!container || container.style.display === 'none') return;
 
     const serial = document.getElementById('search-serial').value;
+    const detectorSerial = document.getElementById('search-detector-serial').value;
     const dateFrom = getDatetime('search-date-from', 'search-time-from');
     const dateTo = getDatetime('search-date-to', 'search-time-to');
     const v = VIEWS[currentView];
@@ -373,6 +376,7 @@ async function loadChart() {
 
     const params = new URLSearchParams();
     if (serial) params.set('serial', serial);
+    if (detectorSerial) params.set('detector_serial', detectorSerial);
     if (dateFrom) params.set('date_from', dateFrom);
     if (dateTo) params.set('date_to', dateTo);
     if (ds) params.set('data_source', ds);
diff --git a/edc-web/app/templates/test_data.html b/edc-web/app/templates/test_data.html
index ad8c995..28a60fa 100644
--- a/edc-web/app/templates/test_data.html
+++ b/edc-web/app/templates/test_data.html
@@ -21,7 +21,11 @@
 <div class="search-bar">
     <label>
         设备编码：
-        <input type="text" id="search-serial" placeholder="输入设备编码搜索...">
+        <input type="text" id="search-serial" placeholder="设备编码...">
+    </label>
+    <label>
+        车检器序列号：
+        <input type="text" id="search-detector-serial" placeholder="车检器序列号...">
     </label>
     <label>
         时间范围：
@@ -38,7 +42,7 @@
         <select id="per-page" onchange="searchData(1)" style="width:70px;">
             <option value="20">20</option>
             <option value="50">50</option>
-            <option value="100">100</option>
+            <option value="100" selected>100</option>
         </select>
     </label>
     <button id="btn-chart" class="btn-chart" onclick="toggleChart()">📈 图表</button>