diff --git a/app/assets/material-library/page.tsx b/app/assets/material-library/page.tsx
index 5685e86..92fcc73 100644
--- a/app/assets/material-library/page.tsx
+++ b/app/assets/material-library/page.tsx
@@ -133,6 +133,7 @@ export default function MaterialLibraryPage() {
   const fetchMaterialsRef = useRef<typeof fetchMaterials | null>(null) // 存储fetchMaterials函数引用
   const materialsRequestIdRef = useRef(0)
   const materialsAbortRef = useRef<AbortController | null>(null)
+  const replacingMaterialsRequestIdRef = useRef<number | null>(null)
   const facetsRequestIdRef = useRef(0)
   const facetsAbortRef = useRef<AbortController | null>(null)
 
@@ -565,7 +566,12 @@ export default function MaterialLibraryPage() {
   // 获取素材列表（支持分页和追加模式）
   const fetchMaterials = useCallback(
     async (page = 1, append = false) => {
+      // 筛选刷新正在替换第一页时，禁止无限滚动请求抢占同一个请求通道。
+      // 否则追加请求会取消筛选请求，却不会负责关闭筛选遮罩，导致页面永久转圈。
+      if (append && replacingMaterialsRequestIdRef.current !== null) return 0
+
       const requestId = ++materialsRequestIdRef.current
+      if (!append) replacingMaterialsRequestIdRef.current = requestId
       materialsAbortRef.current?.abort()
       const controller = new AbortController()
       materialsAbortRef.current = controller
@@ -661,6 +667,7 @@ export default function MaterialLibraryPage() {
         }
       } finally {
         if (!append && requestId === materialsRequestIdRef.current) {
+          replacingMaterialsRequestIdRef.current = null
           setLoading(false)
           setIsTransitionLoading(false)
         }
@@ -993,7 +1000,7 @@ export default function MaterialLibraryPage() {
 
   // 分页+懒加载函数（完全参考flnxi_sucai实现）
   const handleLoadMore = useCallback(async () => {
-    if (isLoadingMore) return
+    if (isLoadingMore || isTransitionLoading || replacingMaterialsRequestIdRef.current !== null) return
 
     // 如果当前显示的数量小于已加载的素材数量，直接增加显示数量
     if (displayedCount < materials.length) {
@@ -1013,7 +1020,7 @@ export default function MaterialLibraryPage() {
       setDisplayedCount((prev) => Math.min(prev + 24, materials.length + appended))
     }
     setIsLoadingMore(false)
-  }, [isLoadingMore, displayedCount, materials.length, hasMore, currentPage, fetchMaterials])
+  }, [isLoadingMore, isTransitionLoading, displayedCount, materials.length, hasMore, currentPage, fetchMaterials])
 
   // IntersectionObserver 逻辑已移至 LoadMoreTrigger 组件
 
@@ -1537,6 +1544,7 @@ export default function MaterialLibraryPage() {
           <LoadMoreTrigger
             hasMore={hasMore}
             isLoading={isLoadingMore}
+            disabled={isTransitionLoading}
             onLoadMore={handleLoadMore}
             themeColor={themeColor}
             displayedCount={displayedCount}
diff --git a/components/home/LoadMoreTrigger.test.tsx b/components/home/LoadMoreTrigger.test.tsx
new file mode 100644
index 0000000..a0a7904
--- /dev/null
+++ b/components/home/LoadMoreTrigger.test.tsx
@@ -0,0 +1,84 @@
+import { act, render } from '@testing-library/react'
+
+import LoadMoreTrigger from '@/components/home/LoadMoreTrigger'
+
+type ObserverCallback = IntersectionObserverCallback
+
+class IntersectionObserverMock {
+  static instances: IntersectionObserverMock[] = []
+
+  callback: ObserverCallback
+  observe = jest.fn()
+  disconnect = jest.fn()
+  unobserve = jest.fn()
+  takeRecords = jest.fn(() => [])
+  root = null
+  rootMargin = ''
+  thresholds = [0]
+
+  constructor(callback: ObserverCallback) {
+    this.callback = callback
+    IntersectionObserverMock.instances.push(this)
+  }
+
+  trigger(isIntersecting: boolean) {
+    this.callback([{ isIntersecting } as IntersectionObserverEntry], this as unknown as IntersectionObserver)
+  }
+}
+
+describe('LoadMoreTrigger', () => {
+  beforeEach(() => {
+    IntersectionObserverMock.instances = []
+    window.IntersectionObserver = IntersectionObserverMock as unknown as typeof IntersectionObserver
+  })
+
+  test('筛选刷新期间不启动懒加载，刷新结束后恢复观察', () => {
+    const onLoadMore = jest.fn()
+    const { rerender } = render(
+      <LoadMoreTrigger
+        hasMore
+        isLoading={false}
+        disabled
+        onLoadMore={onLoadMore}
+      />,
+    )
+
+    expect(IntersectionObserverMock.instances).toHaveLength(0)
+
+    rerender(
+      <LoadMoreTrigger
+        hasMore
+        isLoading={false}
+        disabled={false}
+        onLoadMore={onLoadMore}
+      />,
+    )
+
+    expect(IntersectionObserverMock.instances).toHaveLength(1)
+    act(() => IntersectionObserverMock.instances[0].trigger(true))
+    expect(onLoadMore).toHaveBeenCalledTimes(1)
+  })
+
+  test('筛选刷新开始时断开已有的懒加载观察器', () => {
+    const onLoadMore = jest.fn()
+    const { rerender } = render(
+      <LoadMoreTrigger
+        hasMore
+        isLoading={false}
+        onLoadMore={onLoadMore}
+      />,
+    )
+    const observer = IntersectionObserverMock.instances[0]
+
+    rerender(
+      <LoadMoreTrigger
+        hasMore
+        isLoading={false}
+        disabled
+        onLoadMore={onLoadMore}
+      />,
+    )
+
+    expect(observer.disconnect).toHaveBeenCalledTimes(1)
+  })
+})
diff --git a/components/home/LoadMoreTrigger.tsx b/components/home/LoadMoreTrigger.tsx
index 2ea0bb9..9df1184 100644
--- a/components/home/LoadMoreTrigger.tsx
+++ b/components/home/LoadMoreTrigger.tsx
@@ -5,6 +5,7 @@ import React, { useEffect, useRef, forwardRef } from 'react'
 interface LoadMoreTriggerProps {
   hasMore: boolean
   isLoading: boolean
+  disabled?: boolean
   onLoadMore: () => void
   themeColor?: string
   displayedCount?: number  // 当前显示数量
@@ -19,6 +20,7 @@ interface LoadMoreTriggerProps {
 const LoadMoreTrigger = forwardRef<HTMLDivElement, LoadMoreTriggerProps>(function LoadMoreTrigger({
   hasMore,
   isLoading,
+  disabled = false,
   onLoadMore,
   themeColor = '#1f2937',
   displayedCount,
@@ -34,6 +36,7 @@ const LoadMoreTrigger = forwardRef<HTMLDivElement, LoadMoreTriggerProps>(functio
   useEffect(() => {
     const element = typeof loadMoreRef === 'function' ? null : loadMoreRef.current
     if (!element) return
+    if (disabled) return
     if (isLoading) return
     if (!shouldShowLoadMore) return
 
@@ -49,7 +52,7 @@ const LoadMoreTrigger = forwardRef<HTMLDivElement, LoadMoreTriggerProps>(functio
     observer.observe(element)
 
     return () => observer.disconnect()
-  }, [loadMoreRef, hasMore, isLoading, onLoadMore, shouldShowLoadMore])
+  }, [loadMoreRef, hasMore, isLoading, disabled, onLoadMore, shouldShowLoadMore])
 
   // 显示加载更多
   if (shouldShowLoadMore) {