diff --git a/static/js/api/loraApi.js b/static/js/api/loraApi.js
index 3dae5e81..b34efc77 100644
--- a/static/js/api/loraApi.js
+++ b/static/js/api/loraApi.js
@@ -163,23 +163,28 @@ export async function replacePreview(filePath) {
             }
 
             const data = await response.json();
-            const newPreviewPath = `${data.preview_url}?t=${new Date().getTime()}`;
             
+            // 更新预览版本
+            state.previewVersions.set(filePath, Date.now());
+            
+            // 更新卡片显示
             const card = document.querySelector(`.lora-card[data-filepath="${filePath}"]`);
             const previewContainer = card.querySelector('.card-preview');
             const oldPreview = previewContainer.querySelector('img, video');
             
+            const previewUrl = `${data.preview_url}?t=${state.previewVersions.get(filePath)}`;
+            
             if (file.type.startsWith('video/')) {
                 const video = document.createElement('video');
                 video.controls = true;
                 video.autoplay = true;
                 video.muted = true;
                 video.loop = true;
-                video.src = newPreviewPath;
+                video.src = previewUrl;
                 oldPreview.replaceWith(video);
             } else {
                 const img = document.createElement('img');
-                img.src = newPreviewPath;
+                img.src = previewUrl;
                 oldPreview.replaceWith(img);
             }
             
diff --git a/static/js/components/LoraCard.js b/static/js/components/LoraCard.js
index faf6d52f..7e24c06c 100644
--- a/static/js/components/LoraCard.js
+++ b/static/js/components/LoraCard.js
@@ -1,5 +1,6 @@
 import { showToast } from '../utils/uiHelpers.js';
 import { modalManager } from '../managers/ModalManager.js';
+import { state } from '../state/index.js';
 
 export function createLoraCard(lora) {
     const card = document.createElement('div');
@@ -13,16 +14,17 @@ export function createLoraCard(lora) {
     card.dataset.from_civitai = lora.from_civitai;
     card.dataset.meta = JSON.stringify(lora.civitai || {});
 
-    // Add timestamp to preview URL to prevent caching
-    const previewUrl = lora.preview_url ? `${lora.preview_url}?t=${Date.now()}` : '/loras_static/images/no-preview.png';
+    const version = state.previewVersions.get(lora.file_path);
+    const previewUrl = lora.preview_url || '/loras_static/images/no-preview.png';
+    const versionedPreviewUrl = version ? `${previewUrl}?t=${version}` : previewUrl;
 
     card.innerHTML = `
         <div class="card-preview">
             ${previewUrl.endsWith('.mp4') ? 
                 `<video controls autoplay muted loop>
-                    <source src="${previewUrl}" type="video/mp4">
+                    <source src="${versionedPreviewUrl}" type="video/mp4">
                 </video>` :
-                `<img src="${previewUrl}" alt="${lora.model_name}">`
+                `<img src="${versionedPreviewUrl}" alt="${lora.model_name}">`
             }
             <div class="card-header">
                 <span class="base-model-label" title="${lora.base_model}">
@@ -76,20 +78,6 @@ export function createLoraCard(lora) {
     return card;
 }
 
-export function updatePreviewInCard(filePath, file, previewUrl) {
-    const card = document.querySelector(`.lora-card[data-filepath="${filePath}"]`);
-    const previewContainer = card?.querySelector('.card-preview');
-    const oldPreview = previewContainer?.querySelector('img, video');
-    
-    if (oldPreview) {
-        const newPreviewUrl = `${previewUrl}?t=${Date.now()}`;
-        const newPreview = file.type.startsWith('video/') 
-            ? createVideoPreview(newPreviewUrl)
-            : createImagePreview(newPreviewUrl);
-        oldPreview.replaceWith(newPreview);
-    }
-}
-
 export function showLoraModal(lora) {
     const escapedWords = lora.trainedWords?.length ? 
         lora.trainedWords.map(word => word.replace(/'/g, '\\\'')) : [];
@@ -194,17 +182,4 @@ export function initializeLoraCards() {
                 .catch(() => showToast('Copy failed', 'error'));
         });
     });
-}
-
-function createVideoPreview(url) {
-    const video = document.createElement('video');
-    video.controls = video.autoplay = video.muted = video.loop = true;
-    video.src = url;
-    return video;
-}
-
-function createImagePreview(url) {
-    const img = document.createElement('img');
-    img.src = url;
-    return img;
-} 
\ No newline at end of file
+}
\ No newline at end of file
diff --git a/static/js/main.js b/static/js/main.js
index ed4b543d..26e06033 100644
--- a/static/js/main.js
+++ b/static/js/main.js
@@ -2,7 +2,7 @@ import { debounce } from './utils/debounce.js';
 import { LoadingManager } from './managers/LoadingManager.js';
 import { modalManager } from './managers/ModalManager.js';
 import { state } from './state/index.js';
-import { createLoraCard, updatePreviewInCard, showLoraModal, initializeLoraCards } from './components/LoraCard.js';
+import { showLoraModal, initializeLoraCards } from './components/LoraCard.js';
 import { loadMoreLoras, fetchCivitai, deleteModel, replacePreview, resetAndReload, refreshLoras } from './api/loraApi.js';
 import { showToast, lazyLoadImages, restoreFolderFilter, initTheme, toggleTheme, toggleFolder, copyTriggerWord } from './utils/uiHelpers.js';
 import { initializeInfiniteScroll } from './utils/infiniteScroll.js';
diff --git a/static/js/state/index.js b/static/js/state/index.js
index 0a32af60..3f396d75 100644
--- a/static/js/state/index.js
+++ b/static/js/state/index.js
@@ -5,5 +5,6 @@ export const state = {
     sortBy: 'name',
     activeFolder: null,
     loadingManager: null,
-    observer: null
+    observer: null,
+    previewVersions: new Map()
 }; 
\ No newline at end of file