diff --git a/static/js/app.js b/static/js/app.js
index 9b7a6b6..aec68ab 100644
--- a/static/js/app.js
+++ b/static/js/app.js
@@ -939,17 +939,28 @@ function displayDifferences() {
     });
     
     let html = `
-        <!-- 字段筛选按钮 -->
+        <!-- 字段筛选按钮和操作按钮 -->
         <div class="mb-3">
-            <div class="btn-group btn-group-sm flex-wrap" role="group">
-                <button type="button" class="btn btn-outline-primary active" onclick="filterByField('')">
-                    全部 (${filteredDifferenceResults.length})
-                </button>
-                ${Object.entries(fieldStats).map(([field, count]) => `
-                    <button type="button" class="btn btn-outline-secondary" onclick="filterByField('${field}')">
-                        ${field} (${count})
-                    </button>
-                `).join('')}
+            <div class="row">
+                <div class="col-md-8">
+                    <div class="btn-group btn-group-sm flex-wrap" role="group">
+                        <button type="button" class="btn btn-outline-primary active" onclick="filterByField('')">
+                            全部 (${filteredDifferenceResults.length})
+                        </button>
+                        ${Object.entries(fieldStats).map(([field, count]) => `
+                            <button type="button" class="btn btn-outline-secondary" onclick="filterByField('${field}')">
+                                ${field} (${count})
+                            </button>
+                        `).join('')}
+                    </div>
+                </div>
+                <div class="col-md-4">
+                    <div class="d-flex justify-content-end">
+                        <button type="button" class="btn btn-success btn-sm" onclick="copyDifferenceKeys()">
+                            <i class="fas fa-copy"></i> 复制差异主键
+                        </button>
+                    </div>
+                </div>
             </div>
         </div>
         
@@ -1989,6 +2000,70 @@ function copyRawData() {
     }
 }
 
+// 复制差异主键
+function copyDifferenceKeys() {
+    console.log('copyDifferenceKeys 被调用');
+    console.log('filteredDifferenceResults:', filteredDifferenceResults);
+    
+    if (!filteredDifferenceResults || filteredDifferenceResults.length === 0) {
+        showAlert('warning', '无差异数据可复制');
+        return;
+    }
+    
+    try {
+        // 收集所有差异记录的主键
+        const differenceKeys = [];
+        const uniqueKeys = new Set();
+        
+        filteredDifferenceResults.forEach(diff => {
+            console.log('处理差异记录:', diff);
+            if (diff.key) {
+                let keyText = '';
+                
+                if (typeof diff.key === 'object' && !Array.isArray(diff.key)) {
+                    // 复合主键：转换为逗号分隔格式
+                    keyText = Object.values(diff.key).join(',');
+                } else {
+                    // 单主键或其他格式
+                    keyText = String(diff.key);
+                }
+                
+                console.log('提取的主键:', keyText);
+                
+                // 避免重复主键
+                if (!uniqueKeys.has(keyText)) {
+                    uniqueKeys.add(keyText);
+                    differenceKeys.push(keyText);
+                }
+            }
+        });
+        
+        console.log('收集到的主键列表:', differenceKeys);
+        
+        if (differenceKeys.length === 0) {
+            showAlert('warning', '未找到有效的主键数据');
+            return;
+        }
+        
+        // 将主键列表转换为文本格式（每行一个）
+        const keyText = differenceKeys.join('\n');
+        console.log('准备复制的文本:', keyText);
+        
+        // 复制到剪贴板
+        navigator.clipboard.writeText(keyText).then(() => {
+            console.log('复制成功');
+            showAlert('success', `已复制 ${differenceKeys.length} 个差异主键到剪贴板`);
+        }).catch(err => {
+            console.error('复制失败:', err);
+            showAlert('danger', '复制失败，请手动选择复制');
+        });
+        
+    } catch (error) {
+        console.error('处理差异主键失败:', error);
+        showAlert('danger', '处理差异主键失败: ' + error.message);
+    }
+}
+
 // 显示差异数据的原生数据
 function showDifferenceRawData(keyStr) {
     showRawData(keyStr); // 复用相同的原生数据显示逻辑