diff --git a/src/components/modals/ExportModal.vue b/src/components/modals/ExportModal.vue
index 05df394..c16bea0 100644
--- a/src/components/modals/ExportModal.vue
+++ b/src/components/modals/ExportModal.vue
@@ -138,27 +138,25 @@ const handlePreview = async () => {
   }
 };
 
-const copyToClipboard = async () => {
-  // 生成适合 Excel 的 TSV (Tab-Separated Values) 格式
-  const header = ["日期", ...selectedTags.value.map(id => getTagName(id))];
-  let tsv = header.join("\t") + "\n";
+const copyColumn = async (tagId: number | 'date') => {
+  let lines: string[] = [];
   
   for (const date of sortedDateList.value) {
-    let row = [date];
-    for (const tagId of selectedTags.value) {
+    if (tagId === 'date') {
+      lines.push(date);
+    } else {
       let cellStr = previewData.value[date][tagId] || "";
-      // Excel/Sheets 处理带换行符的单元格，需要用双引号包围，且内容中的双引号要转义为两个双引号
+      // Excel/Sheets 处理带换行符的单元格，需要用双引号包围
       if (cellStr.includes('\n') || cellStr.includes('\t') || cellStr.includes('"')) {
          cellStr = `"${cellStr.replace(/"/g, '""')}"`;
       }
-      row.push(cellStr);
+      lines.push(cellStr);
     }
-    tsv += row.join("\t") + "\n";
   }
 
   try {
-    await navigator.clipboard.writeText(tsv);
-    showToast("表格已复制，可直接粘贴到 Excel");
+    await navigator.clipboard.writeText(lines.join("\n"));
+    showToast(`列数据已复制`);
   } catch(err) {
     showToast("复制失败", "error");
   }
@@ -253,18 +251,23 @@ const copyToClipboard = async () => {
                 {{ isDesc ? '倒序 (由近及远)' : '正序 (由远及近)' }}
               </button>
             </div>
-            <button @click="copyToClipboard" class="flex items-center gap-1.5 px-4 py-2 bg-[#007AFF] hover:bg-[#007AFF]/90 text-white rounded-xl text-xs font-bold transition-all shadow-lg shadow-[#007AFF]/20 active:scale-95">
-              <Copy :size="14" /> 一键复制完整表格
-            </button>
           </div>
           
           <div class="flex-1 overflow-auto border border-border-main rounded-2xl bg-bg-input/30 relative select-text">
             <table class="w-full text-left border-collapse text-xs">
               <thead class="bg-bg-card sticky top-0 z-10 shadow-sm">
                 <tr>
-                  <th class="p-4 border-b border-border-main font-bold whitespace-nowrap text-text-sec w-32">日期</th>
-                  <th v-for="tagId in selectedTags" :key="tagId" class="p-4 border-b border-l border-border-main/50 font-bold whitespace-nowrap" :style="{ color: mainTags.find(t => t.id === tagId)?.color || 'inherit' }">
-                    {{ getTagName(tagId) }}
+                  <th class="p-4 border-b border-border-main font-bold whitespace-nowrap text-text-sec w-32 group">
+                    <div class="flex items-center gap-2">
+                      日期
+                      <button @click="copyColumn('date')" title="复制此列" class="opacity-0 group-hover:opacity-100 p-1 hover:bg-bg-input rounded transition-all text-text-sec"><Copy :size="12"/></button>
+                    </div>
+                  </th>
+                  <th v-for="tagId in selectedTags" :key="tagId" class="p-4 border-b border-l border-border-main/50 font-bold whitespace-nowrap group" :style="{ color: mainTags.find(t => t.id === tagId)?.color || 'inherit' }">
+                    <div class="flex items-center gap-2">
+                      {{ getTagName(tagId) }}
+                      <button @click="copyColumn(tagId)" title="复制此列" class="opacity-0 group-hover:opacity-100 p-1 hover:bg-bg-input rounded transition-all text-text-sec"><Copy :size="12"/></button>
+                    </div>
                   </th>
                 </tr>
               </thead>