diff --git a/src/main/java/com/knowledge/base/application/service/LLMAppServiceImpl.java b/src/main/java/com/knowledge/base/application/service/LLMAppServiceImpl.java
index fabb15c..e07b820 100644
--- a/src/main/java/com/knowledge/base/application/service/LLMAppServiceImpl.java
+++ b/src/main/java/com/knowledge/base/application/service/LLMAppServiceImpl.java
@@ -1,11 +1,13 @@
 package com.knowledge.base.application.service;
 
 import cn.hutool.core.collection.CollectionUtil;
+import cn.hutool.core.util.BooleanUtil;
 import cn.hutool.core.util.StrUtil;
 import cn.hutool.json.JSONUtil;
 import com.google.common.collect.Lists;
 import com.knowledge.base.domain.doc.model.FileEsModel;
 import com.knowledge.base.infrastructure.config.ConstantConfig;
+import com.knowledge.base.infrastructure.config.DynamicConfig;
 import com.knowledge.base.infrastructure.config.ThreadPoolConfig;
 import com.knowledge.base.infrastructure.north.dto.llm.WorkspaceAttachment;
 import com.knowledge.base.infrastructure.south.es.FileElasticsearchGateway;
@@ -39,6 +41,8 @@ public class LLMAppServiceImpl implements LLMAppService {
 
     private final FileElasticsearchGateway esGateway;
 
+    private final DynamicConfig dynamicConfig;
+
     /**
      * pin和unpin的并发控制
      */
@@ -54,9 +58,8 @@ public class LLMAppServiceImpl implements LLMAppService {
     @Override
     public SseEmitter ask(String llmToken, String question, Map<String, Object> params) throws Exception {
         SseEmitter emitter = new SseEmitter(300 * 1000L); // 超时时间设为5分钟
-        List<String> keywords = extractKeywords(question);
-        log.info("正在回答问题： question: {}, keywords: {}", question, JSONUtil.toJsonStr(keywords));
-        List<WorkspaceAttachment> pinnedDocs = pinDocsByKeywords(llmToken, ConstantConfig.DEFAULT_SLUG_ID, keywords, question);
+
+        List<WorkspaceAttachment> finalPinnedDocs = getWorkspaceAttachments(llmToken, question);
 
         ThreadPoolUtil.execute(() -> {
             try {
@@ -73,22 +76,44 @@ public class LLMAppServiceImpl implements LLMAppService {
                     log.warn("SSE发送错误信息失败", ioException);
                 }
             } finally {
-                // 问题结束后，需要unpin掉
-                log.info("问题已回答完成： question: {}, pinnedDocs: {}", question, JSONUtil.toJsonStr(pinnedDocs));
-                pinnedDocs.forEach(doc -> {
-                    try {
-                        anythingLLMService.updatePin(llmToken, ConstantConfig.DEFAULT_SLUG_ID, doc.getDocpath(), false);
-                    } catch (Exception e) {
-                        log.warn("unpin失败: {}", doc, e);
-                    }
-                });
-                PROCESSING = false;
+                unpinLlmAttachments(llmToken, question, finalPinnedDocs);
             }
         }, ThreadPoolConfig.SSE_POOL);
 
         return emitter;
     }
 
+    private void unpinLlmAttachments(String llmToken, String question, List<WorkspaceAttachment> finalPinnedDocs) {
+        if(BooleanUtil.toBoolean(dynamicConfig.getEnableAutoPin())) {
+            // 问题结束后，需要unpin掉
+            log.info("问题已回答完成： question: {}, pinnedDocs: {}", question, JSONUtil.toJsonStr(finalPinnedDocs));
+            finalPinnedDocs.forEach(doc -> {
+                try {
+                    anythingLLMService.updatePin(llmToken, ConstantConfig.DEFAULT_SLUG_ID, doc.getDocpath(), false);
+                } catch (Exception e) {
+                    log.warn("unpin失败: {}", doc, e);
+                }
+            });
+            PROCESSING = false;
+        }else {
+            log.info("[unpinLlmAttachments] 自动pin文档功能未开启. {}", dynamicConfig.getEnableAutoPin());
+        }
+    }
+
+    private List<WorkspaceAttachment> getWorkspaceAttachments(String llmToken, String question) {
+        List<WorkspaceAttachment> finalPinnedDocs;
+        if(BooleanUtil.toBoolean(dynamicConfig.getEnableAutoPin())) {
+            List<String> keywords = extractKeywords(question);
+            log.info("正在回答问题： question: {}, keywords: {}", question, JSONUtil.toJsonStr(keywords));
+            List<WorkspaceAttachment> pinnedDocs = pinDocsByKeywords(llmToken, ConstantConfig.DEFAULT_SLUG_ID, keywords, question);
+            finalPinnedDocs = pinnedDocs;
+        } else {
+            finalPinnedDocs = Collections.emptyList();
+            log.info("[getWorkspaceAttachments] 自动pin文档功能未开启. {}", dynamicConfig.getEnableAutoPin());
+        }
+        return finalPinnedDocs;
+    }
+
     @Override
     public List<WorkspaceAttachment> pinDocsByKeywords(String llmToken, String workspaceSlug, List<String> keywords, String question) {
         if(CollectionUtil.isEmpty(keywords)) {
diff --git a/src/main/java/com/knowledge/base/infrastructure/config/DynamicConfig.java b/src/main/java/com/knowledge/base/infrastructure/config/DynamicConfig.java
index fdafd1a..ef8ccf2 100644
--- a/src/main/java/com/knowledge/base/infrastructure/config/DynamicConfig.java
+++ b/src/main/java/com/knowledge/base/infrastructure/config/DynamicConfig.java
@@ -36,6 +36,9 @@ public class DynamicConfig {
     @Value("${llm.sse.rate.limit: 3}")
     private String llmSseRateLimit;
 
+    @Value("${llm.enable.auto.pin: false}")
+    private String enableAutoPin;
+
     @Value("${markdown.path}")
     private String mdDirectoryPath;
 
diff --git a/src/main/java/com/knowledge/base/infrastructure/south/es/FileElasticsearchGateway.java b/src/main/java/com/knowledge/base/infrastructure/south/es/FileElasticsearchGateway.java
index ef3de00..5406dc1 100644
--- a/src/main/java/com/knowledge/base/infrastructure/south/es/FileElasticsearchGateway.java
+++ b/src/main/java/com/knowledge/base/infrastructure/south/es/FileElasticsearchGateway.java
@@ -66,7 +66,7 @@ public class FileElasticsearchGateway {
         SearchSourceBuilder builder = new SearchSourceBuilder()
                 .query(query)
                 .from(0)
-                .size(6)
+                .size(3)
                 .sort("_score", SortOrder.DESC);
 
         SearchRequest request = new SearchRequest(INDEX_NAME).source(builder);
diff --git a/src/test/java/com/knowledge/base/application/service/LLMAppServiceImplTest.java b/src/test/java/com/knowledge/base/application/service/LLMAppServiceImplTest.java
index 05fded0..d860ab2 100644
--- a/src/test/java/com/knowledge/base/application/service/LLMAppServiceImplTest.java
+++ b/src/test/java/com/knowledge/base/application/service/LLMAppServiceImplTest.java
@@ -49,6 +49,14 @@ public class LLMAppServiceImplTest {
         try {
             List<WorkspaceAttachment> result = llmAppService.pinDocsByKeywords(token, getSlug(), Lists.newArrayList("商业"), "[[商业]] 的本质是什么？");
             log.info("result: {}", JSONUtil.toJsonStr(result));
+
+            result.forEach(doc -> {
+                try {
+                    llmService.updatePin(token, ConstantConfig.DEFAULT_SLUG_ID, doc.getDocpath(), false);
+                } catch (Exception e) {
+                    log.warn("unpin失败: {}", doc, e);
+                }
+            });
         } catch (Exception e) {
             log.warn("测试 pinDocsByKeywords 失败！: {}", e.getMessage(), e);
         }