diff --git a/src/knowledge/implementations/milvus.py b/src/knowledge/implementations/milvus.py
index e50bf3b5..1e01d14c 100644
--- a/src/knowledge/implementations/milvus.py
+++ b/src/knowledge/implementations/milvus.py
@@ -803,7 +803,7 @@ class MilvusKB(KnowledgeBase):
             },
             {
                 "key": "final_top_k",
-                "label": "最终返回数",
+                "label": "最终返回 Chunk 数",
                 "type": "number",
                 "default": 10,
                 "min": 1,
@@ -812,7 +812,7 @@ class MilvusKB(KnowledgeBase):
             },
             {
                 "key": "similarity_threshold",
-                "label": "相似度阈值",
+                "label": "相似度阈值（0-1）",
                 "type": "number",
                 "default": 0.0,
                 "min": 0.0,
@@ -822,7 +822,7 @@ class MilvusKB(KnowledgeBase):
             },
             {
                 "key": "keyword_top_k",
-                "label": "关键词召回数量",
+                "label": "使用关键词召回的最大 Chunk 数",
                 "type": "number",
                 "default": 50,
                 "min": 1,
@@ -855,6 +855,17 @@ class MilvusKB(KnowledgeBase):
                 "default": False,
                 "description": "是否使用精排模型对检索结果进行重排序",
             },
+            {
+                "key": "reranker_model",
+                "label": "重排序模型",
+                "type": "select",
+                "default": "",
+                "options": [
+                    {"label": info.name, "value": model_id}
+                    for model_id, info in kwargs.get("reranker_names", {}).items()
+                ],
+                "description": "选择用于本次查询的重排序模型",
+            },
             {
                 "key": "recall_top_k",
                 "label": "召回数量",
@@ -866,20 +877,6 @@ class MilvusKB(KnowledgeBase):
             },
         ]
 
-        # 动态添加 reranker 模型选择
-        reranker_names = kwargs.get("reranker_names", {})
-        if reranker_names:
-            options.append(
-                {
-                    "key": "reranker_model",
-                    "label": "重排序模型",
-                    "type": "select",
-                    "default": "",
-                    "options": [{"label": info.name, "value": model_id} for model_id, info in reranker_names.items()],
-                    "description": "选择用于本次查询的重排序模型",
-                }
-            )
-
         return {"type": "milvus", "options": options}
 
     def __del__(self):
diff --git a/web/src/components/RAGEvaluationTab.vue b/web/src/components/RAGEvaluationTab.vue
index 5b2d652b..0bade1b4 100644
--- a/web/src/components/RAGEvaluationTab.vue
+++ b/web/src/components/RAGEvaluationTab.vue
@@ -62,7 +62,9 @@
           <a-col :span="12">
             <a-form-item
               :label="
-                selectedBenchmark.has_gold_answers ? '答案生成模型（可选）' : '答案生成模型（当前基准无需）'
+                selectedBenchmark.has_gold_answers
+                  ? '答案生成模型（可选）'
+                  : '答案生成模型（当前基准无需）'
               "
             >
               <ModelSelectorComponent
@@ -78,7 +80,9 @@
           <a-col :span="12">
             <a-form-item
               :label="
-                selectedBenchmark.has_gold_answers ? '答案评判模型（可选）' : '答案评判模型（当前基准无需）'
+                selectedBenchmark.has_gold_answers
+                  ? '答案评判模型（可选）'
+                  : '答案评判模型（当前基准无需）'
               "
             >
               <ModelSelectorComponent
diff --git a/web/src/components/SearchConfigModal.vue b/web/src/components/SearchConfigModal.vue
index d0018d52..416765b2 100644
--- a/web/src/components/SearchConfigModal.vue
+++ b/web/src/components/SearchConfigModal.vue
@@ -28,6 +28,9 @@
           <a-row :gutter="16">
             <a-col :span="12" v-for="param in queryParams" :key="param.key">
               <a-form-item :label="param.label">
+                <template #extra v-if="param.description">
+                  <div class="param-description">{{ param.description }}</div>
+                </template>
                 <a-select
                   v-if="param.type === 'select'"
                   v-model:value="meta[param.key]"
@@ -273,6 +276,13 @@ watch(
   max-width: 100%;
 }
 
+.param-description {
+  font-size: 12px;
+  color: var(--gray-500);
+  line-height: 1.5;
+  margin-top: 4px;
+}
+
 // 表单样式优化
 :deep(.ant-form-item) {
   margin-bottom: 16px;
diff --git a/web/src/views/DataBaseInfoView.vue b/web/src/views/DataBaseInfoView.vue
index 66c4c3d2..eec044f2 100644
--- a/web/src/views/DataBaseInfoView.vue
+++ b/web/src/views/DataBaseInfoView.vue
@@ -678,7 +678,8 @@ const handleMouseUp = () => {
   }
 
   .config-text {
-    font-size: 13px;
+    font-size: 14px;
+    margin-left: 4px;
   }
 }