diff --git a/edc-web/app/static/js/test_data.js b/edc-web/app/static/js/test_data.js
index 37d76bb..432d8b1 100644
--- a/edc-web/app/static/js/test_data.js
+++ b/edc-web/app/static/js/test_data.js
@@ -13,7 +13,7 @@ const VIEWS = {
             { 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' ? '-' : (r.fault_info || '-') },
+            { 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 => decodeRelay(r.relay_code) },
             { key: 'ppvalue',       title: '峰峰值(V)',  render: r => r.data_source === 'B4' ? '-' : (r.ppvalue != null ? r.ppvalue.toFixed(2) : '-') },
             { key: 'idle_freq',     title: '开始频率',   render: r => r.data_source === 'B4' ? '-' : (r.idle_freq || '-') },
@@ -48,7 +48,7 @@ const VIEWS = {
             { key: 'model',         title: '型号',      render: r => r.sub_type === 1 ? 'PD132' : r.sub_type === 2 ? 'DLD110' : '-' },
             { 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' },
+            { 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 => decodeRelay(r.relay_code) },
             { key: 'ppvalue',       title: '峰峰值(V)',  render: r => r.ppvalue?.toFixed(2) || '-' },
             { key: 'idle_freq',     title: '开始频率' },
@@ -121,6 +121,10 @@ function decodeRelay(v) {
     return RELAY_MAP[parseInt(v)] || `0x${parseInt(v).toString(16).toUpperCase().padStart(2, '0')}`;
 }
 
+function escHtml(s) {
+    return (s || '').replace(/&/g, '&amp;').replace(/</g, '&lt;').replace(/>/g, '&gt;').replace(/"/g, '&quot;');
+}
+
 /** 构建测试环境标签 (线圈 + 模拟车辆) */
 function envLabel(r) {
     const parts = [];