diff --git a/templates/local_index.html b/templates/local_index.html
index 0a71f41..3a974b6 100644
--- a/templates/local_index.html
+++ b/templates/local_index.html
@@ -356,7 +356,11 @@
                                     <option value="3">Top 3</option>
                                     <option value="5" selected>Top 5</option>
                                     <option value="10">Top 10</option>
+                                    <option value="50">Top 50</option>
+                                    <option value="100">Top 100</option>
+                                    <option value="custom">自定义</option>
                                 </select>
+                                <input id="textTopKCustom" type="number" min="1" max="1000" placeholder="自定义K" class="form-control mt-2" style="display:none;" />
                             </div>
                             <div class="col-md-2">
                                 <button id="textSearchBtn" class="btn btn-primary w-100">
@@ -382,7 +386,11 @@
                                     <option value="3">Top 3</option>
                                     <option value="5" selected>Top 5</option>
                                     <option value="10">Top 10</option>
+                                    <option value="50">Top 50</option>
+                                    <option value="100">Top 100</option>
+                                    <option value="custom">自定义</option>
                                 </select>
+                                <input id="imageTopKCustom" type="number" min="1" max="1000" placeholder="自定义K" class="form-control mt-2" style="display:none;" />
                             </div>
                             <div class="col-md-2">
                                 <button id="imageSearchBtn" class="btn btn-primary w-100" disabled>
@@ -481,9 +489,34 @@
             if (e.key === 'Enter') performTextSearch();
         });
 
+        // TopK 自定义输入显隐
+        const textTopKSel = document.getElementById('textTopK');
+        const textTopKCustom = document.getElementById('textTopKCustom');
+        const imageTopKSel = document.getElementById('imageTopK');
+        const imageTopKCustom = document.getElementById('imageTopKCustom');
+        textTopKSel.addEventListener('change', () => {
+            textTopKCustom.style.display = textTopKSel.value === 'custom' ? 'block' : 'none';
+        });
+        imageTopKSel.addEventListener('change', () => {
+            imageTopKCustom.style.display = imageTopKSel.value === 'custom' ? 'block' : 'none';
+        });
+
+        function resolveTopK(selectEl, customEl) {
+            let v = selectEl.value;
+            if (v === 'custom') {
+                const n = parseInt(customEl.value, 10);
+                if (!Number.isFinite(n) || n <= 0) {
+                    showAlert('warning', '请输入有效的自定义 Top K 数值');
+                    throw new Error('Invalid custom TopK');
+                }
+                return n;
+            }
+            return parseInt(v, 10);
+        }
+
         async function performTextSearch() {
             const query = document.getElementById('textQuery').value.trim();
-            const topK = parseInt(document.getElementById('textTopK').value);
+            const topK = resolveTopK(textTopKSel, textTopKCustom);
             
             if (!query) {
                 showAlert('warning', '请输入搜索文本');
@@ -563,7 +596,7 @@
         // 图片搜索
         document.getElementById('imageSearchBtn').addEventListener('click', async function() {
             const file = imageFile.files[0];
-            const topK = parseInt(document.getElementById('imageTopK').value);
+            const topK = resolveTopK(imageTopKSel, imageTopKCustom);
             
             if (!file) {
                 showAlert('warning', '请选择图片文件');