diff --git a/web/src/app/home/knowledge/components/kb-card/KBCardVO.ts b/web/src/app/home/knowledge/components/kb-card/KBCardVO.ts
index bfbc2adb..b13d2c24 100644
--- a/web/src/app/home/knowledge/components/kb-card/KBCardVO.ts
+++ b/web/src/app/home/knowledge/components/kb-card/KBCardVO.ts
@@ -3,6 +3,7 @@ export interface IKnowledgeBaseVO {
   name: string;
   description: string;
   embeddingModelUUID: string;
+  top_k: number;
   lastUpdatedTimeAgo: string;
 }
 
@@ -11,6 +12,7 @@ export class KnowledgeBaseVO implements IKnowledgeBaseVO {
   name: string;
   description: string;
   embeddingModelUUID: string;
+  top_k: number;
   lastUpdatedTimeAgo: string;
 
   constructor(props: IKnowledgeBaseVO) {
@@ -18,6 +20,7 @@ export class KnowledgeBaseVO implements IKnowledgeBaseVO {
     this.name = props.name;
     this.description = props.description;
     this.embeddingModelUUID = props.embeddingModelUUID;
+    this.top_k = props.top_k;
     this.lastUpdatedTimeAgo = props.lastUpdatedTimeAgo;
   }
 }
diff --git a/web/src/app/home/knowledge/components/kb-form/KBForm.tsx b/web/src/app/home/knowledge/components/kb-form/KBForm.tsx
index 54d5d6e4..771587f2 100644
--- a/web/src/app/home/knowledge/components/kb-form/KBForm.tsx
+++ b/web/src/app/home/knowledge/components/kb-form/KBForm.tsx
@@ -35,6 +35,10 @@ const getFormSchema = (t: (key: string) => string) =>
     embeddingModelUUID: z
       .string()
       .min(1, { message: t('knowledge.embeddingModelUUIDRequired') }),
+    top_k: z
+      .number()
+      .min(1, { message: t('knowledge.topKRequired') })
+      .max(30, { message: t('knowledge.topKMax') }),
   });
 
 export default function KBForm({
@@ -55,6 +59,7 @@ export default function KBForm({
       name: '',
       description: t('knowledge.defaultDescription'),
       embeddingModelUUID: '',
+      top_k: 5,
     },
   });
 
@@ -69,6 +74,7 @@ export default function KBForm({
           form.setValue('name', val.name);
           form.setValue('description', val.description);
           form.setValue('embeddingModelUUID', val.embeddingModelUUID);
+          form.setValue('top_k', val.top_k || 5);
         });
       }
     });
@@ -83,6 +89,7 @@ export default function KBForm({
           name: res.base.name,
           description: res.base.description,
           embeddingModelUUID: res.base.embedding_model_uuid,
+          top_k: res.base.top_k || 5,
         });
       });
     });
@@ -109,6 +116,7 @@ export default function KBForm({
         name: data.name,
         description: data.description,
         embedding_model_uuid: data.embeddingModelUUID,
+        top_k: data.top_k,
       };
       httpClient
         .updateKnowledgeBase(initKbId, updateKb)
@@ -127,6 +135,7 @@ export default function KBForm({
         name: data.name,
         description: data.description,
         embedding_model_uuid: data.embeddingModelUUID,
+        top_k: data.top_k,
       };
       httpClient
         .createKnowledgeBase(newKb)
@@ -226,6 +235,26 @@ export default function KBForm({
                 </FormItem>
               )}
             />
+            <FormField
+              control={form.control}
+              name="top_k"
+              render={({ field }) => (
+                <FormItem>
+                  <FormLabel>
+                    {t('knowledge.topK')}
+                    <span className="text-red-500">*</span>
+                  </FormLabel>
+                  <FormControl>
+                    <Input
+                      type="number"
+                      {...field}
+                      onChange={(e) => field.onChange(Number(e.target.value))}
+                    />
+                  </FormControl>
+                  <FormMessage />
+                </FormItem>
+              )}
+            />
           </div>
         </form>
       </Form>
diff --git a/web/src/app/home/knowledge/page.tsx b/web/src/app/home/knowledge/page.tsx
index 0a8cc2eb..b290f7be 100644
--- a/web/src/app/home/knowledge/page.tsx
+++ b/web/src/app/home/knowledge/page.tsx
@@ -46,6 +46,7 @@ export default function KnowledgePage() {
           name: kb.name,
           description: kb.description,
           embeddingModelUUID: kb.embedding_model_uuid,
+          top_k: kb.top_k,
           lastUpdatedTimeAgo: lastUpdatedTimeAgoText,
         });
       }),
diff --git a/web/src/app/infra/entities/api/index.ts b/web/src/app/infra/entities/api/index.ts
index 76d0a1f6..787631a3 100644
--- a/web/src/app/infra/entities/api/index.ts
+++ b/web/src/app/infra/entities/api/index.ts
@@ -155,6 +155,7 @@ export interface KnowledgeBase {
   name: string;
   description: string;
   embedding_model_uuid: string;
+  top_k: number;
   created_at?: string;
   updated_at?: string;
 }
diff --git a/web/src/i18n/locales/en-US.ts b/web/src/i18n/locales/en-US.ts
index 7c306d51..0ee05729 100644
--- a/web/src/i18n/locales/en-US.ts
+++ b/web/src/i18n/locales/en-US.ts
@@ -252,6 +252,7 @@ const enUS = {
     today: 'Today',
     kbName: 'Knowledge Base Name',
     kbDescription: 'Knowledge Base Description',
+    topK: 'Top K',
     defaultDescription: 'A knowledge base',
     embeddingModelUUID: 'Embedding Model',
     selectEmbeddingModel: 'Select Embedding Model',
diff --git a/web/src/i18n/locales/ja-JP.ts b/web/src/i18n/locales/ja-JP.ts
index bdd6374d..a2634d4b 100644
--- a/web/src/i18n/locales/ja-JP.ts
+++ b/web/src/i18n/locales/ja-JP.ts
@@ -254,6 +254,7 @@ const jaJP = {
     today: '今日',
     kbName: '知識ベース名',
     kbDescription: '知識ベースの説明',
+    topK: '上位K件',
     defaultDescription: '知識ベース',
     embeddingModelUUID: '埋め込みモデル',
     selectEmbeddingModel: '埋め込みモデルを選択',
diff --git a/web/src/i18n/locales/zh-Hans.ts b/web/src/i18n/locales/zh-Hans.ts
index 5209c5e2..ec9b3049 100644
--- a/web/src/i18n/locales/zh-Hans.ts
+++ b/web/src/i18n/locales/zh-Hans.ts
@@ -247,6 +247,7 @@ const zhHans = {
     today: '今天',
     kbName: '知识库名称',
     kbDescription: '知识库描述',
+    topK: '召回数量',
     defaultDescription: '一个知识库',
     embeddingModelUUID: '嵌入模型',
     selectEmbeddingModel: '选择嵌入模型',