diff --git a/web/src/components/children-delimiter-form.tsx b/web/src/components/children-delimiter-form.tsx
new file mode 100644
index 000000000..7fa417a56
--- /dev/null
+++ b/web/src/components/children-delimiter-form.tsx
@@ -0,0 +1,116 @@
+import { cn } from '@/lib/utils';
+import { forwardRef } from 'react';
+import { useFormContext } from 'react-hook-form';
+import { useTranslation } from 'react-i18next';
+import {
+  FormControl,
+  FormField,
+  FormItem,
+  FormLabel,
+  FormMessage,
+} from './ui/form';
+import { Input, InputProps } from './ui/input';
+import { Switch } from './ui/switch';
+
+interface IProps {
+  value?: string | undefined;
+  onChange?: (val: string | undefined) => void;
+}
+
+export const DelimiterInput = forwardRef<HTMLInputElement, InputProps & IProps>(
+  ({ value, onChange, maxLength, defaultValue, ...props }, ref) => {
+    const nextValue = value
+      ?.replaceAll('\n', '\\n')
+      .replaceAll('\t', '\\t')
+      .replaceAll('\r', '\\r');
+    const handleInputChange = (e: React.ChangeEvent<HTMLInputElement>) => {
+      const val = e.target.value;
+      const nextValue = val
+        .replaceAll('\\n', '\n')
+        .replaceAll('\\t', '\t')
+        .replaceAll('\\r', '\r');
+      onChange?.(nextValue);
+    };
+    return (
+      <Input
+        value={nextValue}
+        onChange={handleInputChange}
+        maxLength={maxLength}
+        defaultValue={defaultValue}
+        ref={ref}
+        className={cn('bg-bg-base', props.className)}
+        {...props}
+      />
+    );
+  },
+);
+
+export function ChildrenDelimiterForm() {
+  const { t } = useTranslation();
+  const form = useFormContext();
+
+  const delimiterValue = form.watch('parser_config.children_delimiter');
+
+  return (
+    <fieldset className="space-y-2">
+      <FormField
+        control={form.control}
+        name="parser_config.enable_children"
+        render={({ field: { value, onChange, ...restProps } }) => (
+          <FormItem className="items-center space-y-0 ">
+            <div className="flex items-center justify-between gap-1">
+              <FormLabel>
+                {t('knowledgeDetails.enableChildrenDelimiter')}
+              </FormLabel>
+
+              <div className="flex-none">
+                <FormControl>
+                  <Switch
+                    checked={value}
+                    onCheckedChange={(checked) => {
+                      if (checked && !delimiterValue) {
+                        form.setValue('parser_config.children_delimiter', '\n');
+                      }
+
+                      onChange(checked);
+                    }}
+                    {...restProps}
+                  />
+                </FormControl>
+              </div>
+            </div>
+          </FormItem>
+        )}
+      />
+
+      {form.getValues('parser_config.enable_children') && (
+        <FormField
+          control={form.control}
+          name="parser_config.children_delimiter"
+          render={({ field }) => (
+            <FormItem className="items-center space-y-0 ">
+              <div className="flex items-center gap-1">
+                <FormLabel
+                  required
+                  tooltip={t('knowledgeDetails.childrenDelimiterTip')}
+                  className="text-sm text-text-secondary whitespace-break-spaces w-1/4"
+                >
+                  {t('knowledgeDetails.childrenDelimiter')}
+                </FormLabel>
+                <div className="w-3/4">
+                  <FormControl>
+                    <DelimiterInput {...field} />
+                  </FormControl>
+                </div>
+              </div>
+              <div className="flex pt-1">
+                <div className="w-1/4"></div>
+                <FormMessage />
+              </div>
+            </FormItem>
+          )}
+        />
+      )}
+    </fieldset>
+  );
+}
diff --git a/web/src/components/chunk-method-dialog/index.tsx b/web/src/components/chunk-method-dialog/index.tsx
index d8a4d1115..2fd3d2617 100644
--- a/web/src/components/chunk-method-dialog/index.tsx
+++ b/web/src/components/chunk-method-dialog/index.tsx
@@ -34,6 +34,7 @@ import {
   AutoKeywordsFormField,
   AutoQuestionsFormField,
 } from '../auto-keywords-form-field';
+import { ChildrenDelimiterForm } from '../children-delimiter-form';
 import { DataFlowSelect } from '../data-pipeline-select';
 import { DelimiterFormField } from '../delimiter-form-field';
 import { EntityTypesFormField } from '../entity-types-form-field';
@@ -111,6 +112,8 @@ export function ChunkMethodDialog({
         layout_recognize: z.string().optional(),
         chunk_token_num: z.coerce.number().optional(),
         delimiter: z.string().optional(),
+        enable_children: z.boolean().optional(),
+        children_delimiter: z.string().optional(),
         auto_keywords: z.coerce.number().optional(),
         auto_questions: z.coerce.number().optional(),
         html4excel: z.boolean().optional(),
@@ -196,6 +199,10 @@ export function ChunkMethodDialog({
       ...data,
       parser_config: {
         ...data.parser_config,
+        // Unset children delimiter if this option is not enabled
+        children_delimiter: data.parser_config.enable_children
+          ? data.parser_config.children_delimiter
+          : null,
         pages: data.parser_config?.pages?.map((x: any) => [x.from, x.to]) ?? [],
       },
     };
@@ -333,6 +340,7 @@ export function ChunkMethodDialog({
                         }
                       ></MaxTokenNumberFormField>
                       <DelimiterFormField></DelimiterFormField>
+                      <ChildrenDelimiterForm />
                     </>
                   )}
                 </FormContainer>
diff --git a/web/src/components/chunk-method-dialog/use-default-parser-values.ts b/web/src/components/chunk-method-dialog/use-default-parser-values.ts
index 238047db6..14495c8b2 100644
--- a/web/src/components/chunk-method-dialog/use-default-parser-values.ts
+++ b/web/src/components/chunk-method-dialog/use-default-parser-values.ts
@@ -12,6 +12,8 @@ export function useDefaultParserValues() {
       layout_recognize: ParseDocumentType.DeepDOC,
       chunk_token_num: 512,
       delimiter: '\n',
+      enable_children: false,
+      children_delimiter: '\n',
       auto_keywords: 0,
       auto_questions: 0,
       html4excel: false,
diff --git a/web/src/locales/en.ts b/web/src/locales/en.ts
index 88bfc3da5..467ca8ade 100644
--- a/web/src/locales/en.ts
+++ b/web/src/locales/en.ts
@@ -295,6 +295,11 @@ export default {
       delimiter: `Delimiter for text`,
       delimiterTip:
         'A delimiter or separator can consist of one or multiple special characters. If it is multiple characters, ensure they are enclosed in backticks( ``). For example, if you configure your delimiters like this: \\n`##`;, then your texts will be separated at line breaks, double hash symbols (##), and semicolons.',
+      enableChildrenDelimiter: 'Child chunk are used for retrieval',
+      childrenDelimiter: 'Delimiter for text',
+      childrenDelimiterTip:
+        'A delimiter or separator can consist of one or multiple special characters. If it is multiple characters, ensure they are enclosed in backticks( ``). For example, if you configure your delimiters like this: \\n`##`;, then your texts will be separated at line breaks, double hash symbols (##), and semicolons.',
+
       html4excel: 'Excel to HTML',
       html4excelTip: `Use with the General chunking method. When disabled, spreadsheets (XLSX or XLS(Excel 97-2003)) in the knowledge base will be parsed into key-value pairs. When enabled, they will be parsed into HTML tables, splitting every 12 rows if the original table has more than 12 rows. See https://ragflow.io/docs/dev/enable_excel2html for details.`,
       autoKeywords: 'Auto-keyword',
@@ -779,7 +784,7 @@ This auto-tagging feature enhances retrieval by adding another layer of domain-s
         'The base URL of your Confluence instance (e.g., https://your-domain.atlassian.net/wiki)',
       confluenceSpaceKeyTip:
         'Optional: Specify a space key to limit syncing to a specific space. Leave empty to sync all accessible spaces. For multiple spaces, separate with commas (e.g., DEV,DOCS,HR)',
-      s3PrefixTip: `Specify the folder path within your S3 bucket to fetch files from. 
+      s3PrefixTip: `Specify the folder path within your S3 bucket to fetch files from.
 Example: general/v2/`,
       S3CompatibleEndpointUrlTip: `Required for S3 compatible Storage Box. Specify the S3-compatible endpoint URL.
 Example: https://fsn1.your-objectstorage.com`,
@@ -1199,6 +1204,7 @@ Example: Virtual Hosted Style`,
       tab: 'Tab',
       space: 'Space',
       delimiters: 'Delimiters',
+      enableChildrenDelimiters: 'Child chunk are used for retrieval',
       merge: 'Merge',
       split: 'Split',
       script: 'Script',
diff --git a/web/src/pages/agent/form/splitter-form/index.tsx b/web/src/pages/agent/form/splitter-form/index.tsx
index 0438dcf8d..c6cb8962a 100644
--- a/web/src/pages/agent/form/splitter-form/index.tsx
+++ b/web/src/pages/agent/form/splitter-form/index.tsx
@@ -2,7 +2,8 @@ import { DelimiterInput } from '@/components/delimiter-form-field';
 import { RAGFlowFormItem } from '@/components/ragflow-form';
 import { SliderInputFormField } from '@/components/slider-input-form-field';
 import { BlockButton, Button } from '@/components/ui/button';
-import { Form } from '@/components/ui/form';
+import { Form, FormControl, FormField, FormItem } from '@/components/ui/form';
+import { Switch } from '@/components/ui/switch';
 import { zodResolver } from '@hookform/resolvers/zod';
 import { Trash2 } from 'lucide-react';
 import { memo } from 'react';
@@ -26,6 +27,12 @@ export const FormSchema = z.object({
       value: z.string().optional(),
     }),
   ),
+  enable_children: z.boolean(),
+  children_delimiters: z.array(
+    z.object({
+      value: z.string().optional(),
+    }),
+  ),
   overlapped_percent: z.number(), // 0.0 - 0.3 , 0% - 30%
 });
 
@@ -46,6 +53,11 @@ const SplitterForm = ({ node }: INextOperatorForm) => {
     control: form.control,
   });
 
+  const childrenDelimiters = useFieldArray({
+    name: 'children_delimiters',
+    control: form.control,
+  });
+
   useWatchFormChange(node?.id, form);
 
   return (
@@ -90,6 +102,59 @@ const SplitterForm = ({ node }: INextOperatorForm) => {
         <BlockButton onClick={() => append({ value: '\n' })}>
           {t('common.add')}
         </BlockButton>
+
+        <fieldset>
+          <div className="mb-2 flex justify-between items-center gap-1">
+            <span>{t('flow.enableChildrenDelimiters')}</span>
+
+            <FormField
+              control={form.control}
+              name="enable_children"
+              render={({ field: { value, onChange, ...restProps } }) => (
+                <FormItem>
+                  <FormControl>
+                    <Switch
+                      checked={value}
+                      onCheckedChange={onChange}
+                      {...restProps}
+                    />
+                  </FormControl>
+                </FormItem>
+              )}
+            />
+          </div>
+
+          {form.getValues('enable_children') && (
+            <div className="space-y-4">
+              {childrenDelimiters.fields.map((field, index) => (
+                <div key={field.id} className="flex items-center gap-2">
+                  <RAGFlowFormItem
+                    name={`children_delimiters.${index}.value`}
+                    label="children_delimiter"
+                    labelClassName="!hidden"
+                    className="flex-auto space-y-0"
+                  >
+                    <DelimiterInput className="!m-0"></DelimiterInput>
+                  </RAGFlowFormItem>
+
+                  <Button
+                    type="button"
+                    variant="ghost"
+                    onClick={() => childrenDelimiters.remove(index)}
+                  >
+                    <Trash2 />
+                  </Button>
+                </div>
+              ))}
+
+              <BlockButton
+                onClick={() => childrenDelimiters.append({ value: '\n' })}
+              >
+                {t('common.add')}
+              </BlockButton>
+            </div>
+          )}
+        </fieldset>
       </FormWrapper>
       <div className="p-5">
         <Output list={outputList}></Output>
diff --git a/web/src/pages/agent/utils.ts b/web/src/pages/agent/utils.ts
index 4f3df85c3..3221d8ca0 100644
--- a/web/src/pages/agent/utils.ts
+++ b/web/src/pages/agent/utils.ts
@@ -288,6 +288,11 @@ function transformSplitterParams(params: SplitterFormSchemaType) {
     ...params,
     overlapped_percent: Number(params.overlapped_percent) / 100,
     delimiters: transformObjectArrayToPureArray(params.delimiters, 'value'),
+
+    // Unset children delimiters if this option is not enabled
+    children_delimiters: params.enable_children
+      ? transformObjectArrayToPureArray(params.children_delimiters, 'value')
+      : [],
   };
 }
 
@@ -713,7 +718,7 @@ export function convertToObjectArray<T extends string | number | boolean>(
 
 /**
    * convert the following object into a list
-   * 
+   *
    * {
       "product_related": {
       "description": "The question is about product usage, appearance and how it works.",
diff --git a/web/src/pages/dataset/dataset-setting/configuration/naive.tsx b/web/src/pages/dataset/dataset-setting/configuration/naive.tsx
index d14eca96f..22c260278 100644
--- a/web/src/pages/dataset/dataset-setting/configuration/naive.tsx
+++ b/web/src/pages/dataset/dataset-setting/configuration/naive.tsx
@@ -2,6 +2,7 @@ import {
   AutoKeywordsFormField,
   AutoQuestionsFormField,
 } from '@/components/auto-keywords-form-field';
+import { ChildrenDelimiterForm } from '@/components/children-delimiter-form';
 import { DelimiterFormField } from '@/components/delimiter-form-field';
 import { ExcelToHtmlFormField } from '@/components/excel-to-html-form-field';
 import { LayoutRecognizeFormField } from '@/components/layout-recognize-form-field';
@@ -21,6 +22,7 @@ export function NaiveConfiguration() {
         <MinerUOptionsFormField></MinerUOptionsFormField>
         <MaxTokenNumberFormField initialValue={512}></MaxTokenNumberFormField>
         <DelimiterFormField></DelimiterFormField>
+        <ChildrenDelimiterForm />
         <EnableTocToggle />
         <OverlappedPercent />
       </ConfigurationFormContainer>
diff --git a/web/src/pages/dataset/dataset-setting/form-schema.ts b/web/src/pages/dataset/dataset-setting/form-schema.ts
index 00c00a725..575dbb17b 100644
--- a/web/src/pages/dataset/dataset-setting/form-schema.ts
+++ b/web/src/pages/dataset/dataset-setting/form-schema.ts
@@ -24,6 +24,8 @@ export const formSchema = z
         layout_recognize: z.string(),
         chunk_token_num: z.number(),
         delimiter: z.string(),
+        enable_children: z.boolean(),
+        children_delimiter: z.string(),
         auto_keywords: z.number().optional(),
         auto_questions: z.number().optional(),
         html4excel: z.boolean(),
diff --git a/web/src/pages/dataset/dataset-setting/index.tsx b/web/src/pages/dataset/dataset-setting/index.tsx
index 02667ae49..f8e3ee0cc 100644
--- a/web/src/pages/dataset/dataset-setting/index.tsx
+++ b/web/src/pages/dataset/dataset-setting/index.tsx
@@ -63,6 +63,8 @@ export default function DatasetSettings() {
         layout_recognize: DocumentType.DeepDOC,
         chunk_token_num: 512,
         delimiter: `\n`,
+        enable_children: false,
+        children_delimiter: `\n`,
         auto_keywords: 0,
         auto_questions: 0,
         html4excel: false,
diff --git a/web/src/pages/dataset/dataset-setting/saving-button.tsx b/web/src/pages/dataset/dataset-setting/saving-button.tsx
index 558150b4f..155dad13c 100644
--- a/web/src/pages/dataset/dataset-setting/saving-button.tsx
+++ b/web/src/pages/dataset/dataset-setting/saving-button.tsx
@@ -67,6 +67,13 @@ export function SavingButton() {
                 await saveKnowledgeConfiguration({
                   kb_id,
                   ...values,
+                  parser_config: {
+                    ...values.parser_config,
+                    // Unset children delimiter if this option is not enabled
+                    children_delimiter: values.parser_config.enable_children
+                      ? values.parser_config.children_delimiter
+                      : null,
+                  },
                 });
               })();
             }