diff --git a/static/css/search.css b/static/css/search.css
index e9ec94a..82e74d6 100644
--- a/static/css/search.css
+++ b/static/css/search.css
@@ -217,6 +217,11 @@
     background: #f0fdf4;
 }
 
+.result-item.exists {
+    border-color: #f59e0b;
+    background: #fffbeb;
+}
+
 .result-item.fetched {
     border-color: #3b82f6;
 }
diff --git a/static/js/search.js b/static/js/search.js
index 3ab3319..b35f601 100644
--- a/static/js/search.js
+++ b/static/js/search.js
@@ -127,6 +127,21 @@ function displayResults() {
     `).join('');
 }
 
+// 检查URL是否已在内容库
+async function checkUrlExists(url) {
+    try {
+        const response = await fetch(`${API_BASE}/api/articles/search?q=${encodeURIComponent(url)}`);
+        const data = await response.json();
+        if (data.success && data.articles && data.articles.length > 0) {
+            // 检查是否有完全匹配的 URL
+            return data.articles.some(a => a.url === url);
+        }
+    } catch (error) {
+        console.error('检查URL失败:', error);
+    }
+    return false;
+}
+
 // 抓取单个结果
 async function fetchResult(index) {
     const result = searchResults[index];
@@ -134,6 +149,28 @@ async function fetchResult(index) {
 
     const btn = document.getElementById(`fetch-btn-${index}`);
     btn.disabled = true;
+    btn.innerHTML = '<i class="ri-loader-4-line"></i> 检查中...';
+
+    // 先检查内容库是否已存在
+    const exists = await checkUrlExists(result.url);
+    if (exists) {
+        searchResults[index].fetched = true;
+        searchResults[index].saved = true;
+        searchResults[index].content = '[内容库中已存在此链接]';
+        btn.innerHTML = '<i class="ri-check-line"></i> 已存在';
+        btn.className = 'btn btn-sm btn-warning';
+        
+        const saveBtn = document.getElementById(`save-btn-${index}`);
+        saveBtn.disabled = true;
+        saveBtn.innerHTML = '<i class="ri-check-line"></i> 已存在';
+        
+        const item = document.getElementById(`result-${index}`);
+        item.classList.add('saved');
+        
+        showToast('该链接已在内容库中', 'warning');
+        return;
+    }
+
     btn.innerHTML = '<i class="ri-loader-4-line"></i> 抓取中...';
 
     try {
@@ -178,10 +215,16 @@ async function saveResult(index) {
     const result = searchResults[index];
     if (!result) return;
 
+    // 如果已经保存（可能是内容库中已存在），直接返回
+    if (result.saved) {
+        return;
+    }
+
     // 如果未抓取，先抓取
     if (!result.fetched) {
         await fetchResult(index);
-        if (!searchResults[index].fetched) return;
+        // 抓取后如果已标记为 saved（内容库已存在），不继续保存
+        if (searchResults[index].saved) return;
     }
 
     const btn = document.getElementById(`save-btn-${index}`);