diff --git a/yudao-module-llm/yudao-module-llm-biz/src/main/java/cn/iocoder/yudao/module/llm/controller/admin/knowledgebase/vo/KnowledgeBaseSaveReqVO.java b/yudao-module-llm/yudao-module-llm-biz/src/main/java/cn/iocoder/yudao/module/llm/controller/admin/knowledgebase/vo/KnowledgeBaseSaveReqVO.java
index 40177bc6f..0c5d43d69 100644
--- a/yudao-module-llm/yudao-module-llm-biz/src/main/java/cn/iocoder/yudao/module/llm/controller/admin/knowledgebase/vo/KnowledgeBaseSaveReqVO.java
+++ b/yudao-module-llm/yudao-module-llm-biz/src/main/java/cn/iocoder/yudao/module/llm/controller/admin/knowledgebase/vo/KnowledgeBaseSaveReqVO.java
@@ -32,9 +32,14 @@ public class KnowledgeBaseSaveReqVO {
     @Schema(description = "知识长度")
     private Integer knowledgeLength;
 
+    /**
+     * 分块大小
+     */
+    private Integer chunkSize;
+
     @Schema(description = "文件引用")
     private String knowledgeFile;
 
     @Schema(description = "文件引用上传")
     private List<KnowledgeDocumentsSaveReqVO> knowledgeDocuments;
-}
\ No newline at end of file
+}
diff --git a/yudao-module-llm/yudao-module-llm-biz/src/main/java/cn/iocoder/yudao/module/llm/dal/dataobject/knowledgedocuments/KnowledgeDocumentsDO.java b/yudao-module-llm/yudao-module-llm-biz/src/main/java/cn/iocoder/yudao/module/llm/dal/dataobject/knowledgedocuments/KnowledgeDocumentsDO.java
index 878893a51..854a28c7b 100644
--- a/yudao-module-llm/yudao-module-llm-biz/src/main/java/cn/iocoder/yudao/module/llm/dal/dataobject/knowledgedocuments/KnowledgeDocumentsDO.java
+++ b/yudao-module-llm/yudao-module-llm-biz/src/main/java/cn/iocoder/yudao/module/llm/dal/dataobject/knowledgedocuments/KnowledgeDocumentsDO.java
@@ -48,5 +48,8 @@ public class KnowledgeDocumentsDO extends BaseDO {
      * 文件Id
      */
     private Long fileId;
-
+    /**
+     * 分块大小
+     */
+    private Integer chunkSize;
 }
diff --git a/yudao-module-llm/yudao-module-llm-biz/src/main/java/cn/iocoder/yudao/module/llm/service/http/RagHttpService.java b/yudao-module-llm/yudao-module-llm-biz/src/main/java/cn/iocoder/yudao/module/llm/service/http/RagHttpService.java
index ac683ba3e..4380fdb3f 100644
--- a/yudao-module-llm/yudao-module-llm-biz/src/main/java/cn/iocoder/yudao/module/llm/service/http/RagHttpService.java
+++ b/yudao-module-llm/yudao-module-llm-biz/src/main/java/cn/iocoder/yudao/module/llm/service/http/RagHttpService.java
@@ -51,6 +51,7 @@ import java.nio.file.Paths;
 import java.nio.file.StandardCopyOption;
 import java.util.List;
 import java.util.Map;
+import java.util.Optional;
 import java.util.concurrent.TimeUnit;
 
 import static cn.iocoder.yudao.framework.common.exception.util.ServiceExceptionUtil.exception;
@@ -388,9 +389,10 @@ public class RagHttpService {
         String fileId = reqVO.getFileId();
         String fileName = reqVO.getFileName();
         String fileUrl = reqVO.getFileUrl();
+        Integer chunkSize = Optional.ofNullable(reqVO.getChunkSize()).orElse(1500);
         String mediaType = getMediaType(fileName);
 
-        log.info("文件ID: {}, 文件名: {}, 文件URL: {}, 文件类型: {}", fileId, fileName, fileUrl, mediaType);
+        log.info("文件ID: {}, 文件名: {}, 文件URL: {}, 文件类型: {}, 分块大小:{}", fileId, fileName, fileUrl, mediaType,chunkSize);
 
         // 获取知识库文档
         log.info("开始获取知识库文档，知识库ID: {}, 文件ID: {}", id, fileId);
@@ -447,6 +449,7 @@ public class RagHttpService {
         RequestBody requestBody = new MultipartBody.Builder()
                 .setType(MultipartBody.FORM)
                 .addFormDataPart("file_id", fileId)
+                .addFormDataPart("chunk_size", String.valueOf(chunkSize))
                 .addFormDataPart("file", fileName,
                         RequestBody.create(tempFilePath.toFile(), MediaType.parse(mediaType))
                 )
diff --git a/yudao-module-llm/yudao-module-llm-biz/src/main/java/cn/iocoder/yudao/module/llm/service/http/vo/KnowledgeRagEmbedReqVO.java b/yudao-module-llm/yudao-module-llm-biz/src/main/java/cn/iocoder/yudao/module/llm/service/http/vo/KnowledgeRagEmbedReqVO.java
index 708f0f406..646c3a2bb 100644
--- a/yudao-module-llm/yudao-module-llm-biz/src/main/java/cn/iocoder/yudao/module/llm/service/http/vo/KnowledgeRagEmbedReqVO.java
+++ b/yudao-module-llm/yudao-module-llm-biz/src/main/java/cn/iocoder/yudao/module/llm/service/http/vo/KnowledgeRagEmbedReqVO.java
@@ -41,4 +41,9 @@ public class KnowledgeRagEmbedReqVO {
      * 文件字节数组
      */
     private byte[] fileBytes;
+
+    /**
+     * 分块大小
+     */
+    private Integer chunkSize;
 }
diff --git a/yudao-module-llm/yudao-module-llm-biz/src/main/java/cn/iocoder/yudao/module/llm/service/knowledgebase/KnowledgeBaseServiceImpl.java b/yudao-module-llm/yudao-module-llm-biz/src/main/java/cn/iocoder/yudao/module/llm/service/knowledgebase/KnowledgeBaseServiceImpl.java
index 397fcfc76..3229b0bfb 100644
--- a/yudao-module-llm/yudao-module-llm-biz/src/main/java/cn/iocoder/yudao/module/llm/service/knowledgebase/KnowledgeBaseServiceImpl.java
+++ b/yudao-module-llm/yudao-module-llm-biz/src/main/java/cn/iocoder/yudao/module/llm/service/knowledgebase/KnowledgeBaseServiceImpl.java
@@ -106,6 +106,7 @@ public class KnowledgeBaseServiceImpl implements KnowledgeBaseService {
             updateReqVO.getKnowledgeDocuments().forEach(doc -> {
                 KnowledgeDocumentsDO docDO = BeanUtils.toBean(doc, KnowledgeDocumentsDO.class);
                 docDO.setKnowledgeBaseId(updateReqVO.getId());
+                docDO.setChunkSize(updateObj.getKnowledgeLength());
                 if (doc.getId() == null) {
                     newDocuments.add(docDO); // 收集新增文档
                 }