diff --git a/web/src/pages/add-knowledge/components/knowledge-chunk/components/document-preview/hooks.ts b/web/src/pages/add-knowledge/components/knowledge-chunk/components/document-preview/hooks.ts
index f15990587..41eeb452a 100644
--- a/web/src/pages/add-knowledge/components/knowledge-chunk/components/document-preview/hooks.ts
+++ b/web/src/pages/add-knowledge/components/knowledge-chunk/components/document-preview/hooks.ts
@@ -1,4 +1,5 @@
 import { useSize } from 'ahooks';
+import { CustomTextRenderer } from 'node_modules/react-pdf/dist/esm/shared/types';
 import { useCallback, useEffect, useState } from 'react';
 
 export const useDocumentResizeObserver = () => {
@@ -18,3 +19,27 @@ export const useDocumentResizeObserver = () => {
 
   return { containerWidth, setContainerRef };
 };
+
+function highlightPattern(text: string, pattern: string, pageNumber: number) {
+  const finalText = '';
+  console.info(text);
+  if (pageNumber === 2) {
+    return `<mark>${text}</mark>`;
+  }
+  if (text.trim() !== '' && pattern.match(text)) {
+    // return pattern.replace(text, (value) => `<mark>${value}</mark>`);
+    return `<mark>${text}</mark>`;
+  }
+  return text.replace(pattern, (value) => `<mark>${value}</mark>`);
+}
+
+export const useHighlightText = (searchText: string = '') => {
+  const textRenderer: CustomTextRenderer = useCallback(
+    (textItem) => {
+      return highlightPattern(textItem.str, searchText, textItem.pageNumber);
+    },
+    [searchText],
+  );
+
+  return textRenderer;
+};
diff --git a/web/src/pages/add-knowledge/components/knowledge-chunk/components/document-preview/index.tsx b/web/src/pages/add-knowledge/components/knowledge-chunk/components/document-preview/index.tsx
index 57d3a4ac4..2df5d8896 100644
--- a/web/src/pages/add-knowledge/components/knowledge-chunk/components/document-preview/index.tsx
+++ b/web/src/pages/add-knowledge/components/knowledge-chunk/components/document-preview/index.tsx
@@ -5,8 +5,10 @@ import { Document, Page, pdfjs } from 'react-pdf';
 
 import 'react-pdf/dist/esm/Page/AnnotationLayer.css';
 import 'react-pdf/dist/esm/Page/TextLayer.css';
-import { useDocumentResizeObserver } from './hooks';
+import { useDocumentResizeObserver, useHighlightText } from './hooks';
 
+import { Spin } from 'antd';
+import { useGetSelectedChunk } from '../../hooks';
 import styles from './index.less';
 
 pdfjs.GlobalWorkerOptions.workerSrc = new URL(
@@ -14,10 +16,17 @@ pdfjs.GlobalWorkerOptions.workerSrc = new URL(
   import.meta.url,
 ).toString();
 
-const DocumentPreview = () => {
+interface IProps {
+  selectedChunkId: string;
+}
+
+const DocumentPreview = ({ selectedChunkId }: IProps) => {
   const [numPages, setNumPages] = useState<number>();
   const { documentId } = useGetKnowledgeSearchParams();
   const { containerWidth, setContainerRef } = useDocumentResizeObserver();
+  const selectedChunk = useGetSelectedChunk(selectedChunkId);
+  console.info(selectedChunk?.content_with_weight);
+  const textRenderer = useHighlightText(selectedChunk?.content_with_weight);
 
   function onDocumentLoadSuccess({ numPages }: { numPages: number }): void {
     setNumPages(numPages);
@@ -29,12 +38,17 @@ const DocumentPreview = () => {
 
   return (
     <div ref={setContainerRef} className={styles.documentContainer}>
-      <Document file={url} onLoadSuccess={onDocumentLoadSuccess}>
+      <Document
+        file={url}
+        onLoadSuccess={onDocumentLoadSuccess}
+        loading={<Spin></Spin>}
+      >
         {Array.from(new Array(numPages), (el, index) => (
           <Page
             key={`page_${index + 1}`}
             pageNumber={index + 1}
             width={containerWidth}
+            customTextRenderer={textRenderer}
           />
         ))}
       </Document>
diff --git a/web/src/pages/add-knowledge/components/knowledge-chunk/hooks.ts b/web/src/pages/add-knowledge/components/knowledge-chunk/hooks.ts
index e84d47650..134f8db21 100644
--- a/web/src/pages/add-knowledge/components/knowledge-chunk/hooks.ts
+++ b/web/src/pages/add-knowledge/components/knowledge-chunk/hooks.ts
@@ -1,4 +1,4 @@
-import { IKnowledgeFile } from '@/interfaces/database/knowledge';
+import { IChunk, IKnowledgeFile } from '@/interfaces/database/knowledge';
 import { useCallback, useState } from 'react';
 import { useSelector } from 'umi';
 
@@ -9,6 +9,13 @@ export const useSelectDocumentInfo = () => {
   return documentInfo;
 };
 
+export const useSelectChunkList = () => {
+  const chunkList: IChunk[] = useSelector(
+    (state: any) => state.chunkModel.data,
+  );
+  return chunkList;
+};
+
 export const useHandleChunkCardClick = () => {
   const [selectedChunkId, setSelectedChunkId] = useState<string>('');
 
@@ -18,3 +25,8 @@ export const useHandleChunkCardClick = () => {
 
   return { handleChunkCardClick, selectedChunkId };
 };
+
+export const useGetSelectedChunk = (selectedChunkId: string) => {
+  const chunkList: IChunk[] = useSelectChunkList();
+  return chunkList.find((x) => x.chunk_id === selectedChunkId);
+};
diff --git a/web/src/pages/add-knowledge/components/knowledge-chunk/index.tsx b/web/src/pages/add-knowledge/components/knowledge-chunk/index.tsx
index f69f42f9b..907b7b64e 100644
--- a/web/src/pages/add-knowledge/components/knowledge-chunk/index.tsx
+++ b/web/src/pages/add-knowledge/components/knowledge-chunk/index.tsx
@@ -205,7 +205,9 @@ const Chunk = () => {
 
           {documentInfo.type === 'pdf' && (
             <section className={styles.documentPreview}>
-              <DocumentPreview></DocumentPreview>
+              <DocumentPreview
+                selectedChunkId={selectedChunkId}
+              ></DocumentPreview>
             </section>
           )}
         </Flex>
diff --git a/web/src/pages/add-knowledge/components/knowledge-chunk/model.ts b/web/src/pages/add-knowledge/components/knowledge-chunk/model.ts
index 793a53ea5..5d9089a98 100644
--- a/web/src/pages/add-knowledge/components/knowledge-chunk/model.ts
+++ b/web/src/pages/add-knowledge/components/knowledge-chunk/model.ts
@@ -1,5 +1,5 @@
 import { BaseState } from '@/interfaces/common';
-import { IKnowledgeFile } from '@/interfaces/database/knowledge';
+import { IChunk, IKnowledgeFile } from '@/interfaces/database/knowledge';
 import kbService from '@/services/kbService';
 import { message } from 'antd';
 import { pick } from 'lodash';
@@ -7,7 +7,7 @@ import { pick } from 'lodash';
 import { DvaModel } from 'umi';
 
 export interface ChunkModelState extends BaseState {
-  data: any[];
+  data: IChunk[];
   total: number;
   isShowCreateModal: boolean;
   chunk_id: string;