diff --git a/src/renderer/src/hooks/usePreprocess.ts b/src/renderer/src/hooks/usePreprocess.ts
index 5172e2c68a..96e01ec407 100644
--- a/src/renderer/src/hooks/usePreprocess.ts
+++ b/src/renderer/src/hooks/usePreprocess.ts
@@ -1,4 +1,5 @@
 import { RootState } from '@renderer/store'
+import { syncPreprocessProvider as _syncPreprocessProvider } from '@renderer/store/knowledge'
 import {
   setDefaultPreprocessProvider as _setDefaultPreprocessProvider,
   updatePreprocessProvider as _updatePreprocessProvider,
@@ -17,7 +18,14 @@ export const usePreprocessProvider = (id: PreprocessProviderId) => {
 
   return {
     provider,
-    updateProvider: (updates: Partial<PreprocessProvider>) => dispatch(_updatePreprocessProvider({ id, ...updates }))
+    updateProvider: (updates: Partial<PreprocessProvider>) => {
+      const payload = { id, ...updates }
+      dispatch(_updatePreprocessProvider(payload))
+      // 将更新同步到所有知识库中的引用
+      if (updates.apiHost || updates.apiKey || updates.model) {
+        dispatch(_syncPreprocessProvider(payload))
+      }
+    }
   }
 }
 
diff --git a/src/renderer/src/services/KnowledgeService.ts b/src/renderer/src/services/KnowledgeService.ts
index 02fb646563..ad0e113266 100644
--- a/src/renderer/src/services/KnowledgeService.ts
+++ b/src/renderer/src/services/KnowledgeService.ts
@@ -21,6 +21,17 @@ export const getKnowledgeBaseParams = (base: KnowledgeBase): KnowledgeBaseParams
   const aiProvider = new AiProvider(provider)
   const rerankAiProvider = new AiProvider(rerankProvider)
 
+  // get preprocess provider from store instead of base.preprocessProvider
+  const preprocessProvider = store
+    .getState()
+    .preprocess.providers.find((p) => p.id === base.preprocessProvider?.provider.id)
+  const updatedPreprocessProvider = preprocessProvider
+    ? {
+        type: 'preprocess' as const,
+        provider: preprocessProvider
+      }
+    : base.preprocessProvider
+
   let host = aiProvider.getBaseURL()
   const rerankHost = rerankAiProvider.getBaseURL()
   if (provider.type === 'gemini') {
@@ -57,7 +68,7 @@ export const getKnowledgeBaseParams = (base: KnowledgeBase): KnowledgeBaseParams
       apiKey: rerankAiProvider.getApiKey() || 'secret',
       baseURL: rerankHost
     },
-    preprocessProvider: base.preprocessProvider,
+    preprocessProvider: updatedPreprocessProvider,
     documentCount: base.documentCount
   }
 }
diff --git a/src/renderer/src/store/knowledge.ts b/src/renderer/src/store/knowledge.ts
index b82e99f471..b006d30dd1 100644
--- a/src/renderer/src/store/knowledge.ts
+++ b/src/renderer/src/store/knowledge.ts
@@ -1,7 +1,7 @@
 import { loggerService } from '@logger'
 import { createSlice, PayloadAction } from '@reduxjs/toolkit'
 import FileManager from '@renderer/services/FileManager'
-import { FileMetadata, KnowledgeBase, KnowledgeItem, ProcessingStatus } from '@renderer/types'
+import { FileMetadata, KnowledgeBase, KnowledgeItem, PreprocessProvider, ProcessingStatus } from '@renderer/types'
 
 const logger = loggerService.withContext('Store:Knowledge')
 
@@ -174,6 +174,18 @@ const knowledgeSlice = createSlice({
       }
     },
 
+    syncPreprocessProvider(state, action: PayloadAction<Partial<PreprocessProvider>>) {
+      const updatedProvider = action.payload
+      state.bases.forEach((base) => {
+        if (base.preprocessProvider && base.preprocessProvider.provider.id === updatedProvider.id) {
+          base.preprocessProvider.provider = {
+            ...base.preprocessProvider.provider,
+            ...updatedProvider
+          }
+        }
+      })
+    },
+
     updateBaseItemUniqueId(
       state,
       action: PayloadAction<{ baseId: string; itemId: string; uniqueId: string; uniqueIds: string[] }>
@@ -221,7 +233,8 @@ export const {
   clearCompletedProcessing,
   clearAllProcessing,
   updateBaseItemUniqueId,
-  updateBaseItemIsPreprocessed
+  updateBaseItemIsPreprocessed,
+  syncPreprocessProvider
 } = knowledgeSlice.actions
 
 export default knowledgeSlice.reducer