diff --git a/src/hooks/useExport.ts b/src/hooks/useExport.ts
index 44a1c139..665de43e 100644
--- a/src/hooks/useExport.ts
+++ b/src/hooks/useExport.ts
@@ -389,8 +389,8 @@ export default () => {
       if (slide.background) {
         const background = slide.background
         if (background.type === 'image' && background.image) {
-          if (isBase64Image(background.image)) pptxSlide.background = { data: background.image }
-          else pptxSlide.background = { path: background.image }
+          if (isBase64Image(background.image.src)) pptxSlide.background = { data: background.image.src }
+          else pptxSlide.background = { path: background.image.src }
         }
         else if (background.type === 'solid' && background.color) {
           const c = formatColor(background.color)
diff --git a/src/hooks/useImport.ts b/src/hooks/useImport.ts
index c21a8a51..de8ade58 100644
--- a/src/hooks/useImport.ts
+++ b/src/hooks/useImport.ts
@@ -113,8 +113,10 @@ export default () => {
         if (type === 'image') {
           background = {
             type: 'image',
-            image: value.picBase64,
-            imageSize: 'cover',
+            image: {
+              src: value.picBase64,
+              size: 'cover',
+            },
           }
         }
         else if (type === 'gradient') {
diff --git a/src/hooks/useSlideBackgroundStyle.ts b/src/hooks/useSlideBackgroundStyle.ts
index a00b8d90..ba12e6a3 100644
--- a/src/hooks/useSlideBackgroundStyle.ts
+++ b/src/hooks/useSlideBackgroundStyle.ts
@@ -10,7 +10,6 @@ export default (background: Ref<SlideBackground | undefined>) => {
       type,
       color,
       image,
-      imageSize,
       gradient,
     } = background.value
 
@@ -19,19 +18,20 @@ export default (background: Ref<SlideBackground | undefined>) => {
 
     // 背景图模式
     // 包括：背景图、背景大小，是否重复
-    else if (type === 'image') {
-      if (!image) return { backgroundColor: '#fff' }
-      if (imageSize === 'repeat') {
+    else if (type === 'image' && image) {
+      const { src, size } = image
+      if (!src) return { backgroundColor: '#fff' }
+      if (size === 'repeat') {
         return {
-          backgroundImage: `url(${image}`,
+          backgroundImage: `url(${src}`,
           backgroundRepeat: 'repeat',
           backgroundSize: 'contain',
         }
       }
       return {
-        backgroundImage: `url(${image}`,
+        backgroundImage: `url(${src}`,
         backgroundRepeat: 'no-repeat',
-        backgroundSize: imageSize || 'cover',
+        backgroundSize: size || 'cover',
       }
     }
 
diff --git a/src/types/slides.ts b/src/types/slides.ts
index 346c49bf..71140d70 100644
--- a/src/types/slides.ts
+++ b/src/types/slides.ts
@@ -87,6 +87,8 @@ export interface PPTElementOutline {
   color?: string
 }
 
+export type ElementLinkType = 'web' | 'slide'
+
 /**
  * 元素超链接
  * 
@@ -95,7 +97,7 @@ export interface PPTElementOutline {
  * target: 目标地址（网页链接、幻灯片页面ID）
  */
 export interface PPTElementLink {
-  type: 'web' | 'slide'
+  type: ElementLinkType
   target: string
 }
 
@@ -429,6 +431,7 @@ export interface PPTChartElement extends PPTBaseElement {
 }
 
 
+export type TextAlign = 'left' | 'center' | 'right' | 'justify'
 /**
  * 表格单元格样式
  * 
@@ -459,7 +462,7 @@ export interface TableCellStyle {
   backcolor?: string
   fontsize?: string
   fontname?: string
-  align?: 'left' | 'center' | 'right' | 'justify'
+  align?: TextAlign
 }
 
 
@@ -635,6 +638,13 @@ export interface PPTAnimation {
   trigger: AnimationTrigger
 }
 
+export type SlideBackgroundType = 'solid' | 'image' | 'gradient'
+export type SlideBackgroundImageSize = 'cover' | 'contain' | 'repeat'
+export interface SlideBackgroundImage {
+  src: string
+  size: SlideBackgroundImageSize,
+}
+
 /**
  * 幻灯片背景
  * 
@@ -642,21 +652,14 @@ export interface PPTAnimation {
  * 
  * color?: 背景颜色（纯色）
  * 
- * image?: 图片地址（图片）
+ * image?: 图片背景
  * 
- * imageSize?: 图片填充方式
- * 
- * gradientType?: 渐变类型（线性、径向）
- * 
- * gradientColor?: 渐变颜色
- * 
- * gradientRotate?: 渐变角度（线性）
+ * gradientType?: 渐变背景
  */
 export interface SlideBackground {
-  type: 'solid' | 'image' | 'gradient'
+  type: SlideBackgroundType
   color?: string
-  image?: string
-  imageSize?: 'cover' | 'contain' | 'repeat'
+  image?: SlideBackgroundImage
   gradient?: Gradient
 }
 
diff --git a/src/views/Editor/Canvas/LinkDialog.vue b/src/views/Editor/Canvas/LinkDialog.vue
index 26c3aac0..aa1a8eac 100644
--- a/src/views/Editor/Canvas/LinkDialog.vue
+++ b/src/views/Editor/Canvas/LinkDialog.vue
@@ -36,7 +36,7 @@
 import { computed, onMounted, ref } from 'vue'
 import { storeToRefs } from 'pinia'
 import { useMainStore, useSlidesStore } from '@/store'
-import type { PPTElementLink } from '@/types/slides'
+import type { ElementLinkType, PPTElementLink } from '@/types/slides'
 import useLink from '@/hooks/useLink'
 
 import ThumbnailSlide from '@/views/components/ThumbnailSlide/index.vue'
@@ -45,9 +45,8 @@ import Input from '@/components/Input.vue'
 import Button from '@/components/Button.vue'
 import Select from '@/components/Select.vue'
 
-type TypeKey = 'web' | 'slide'
 interface TabItem {
-  key: TypeKey
+  key: ElementLinkType
   label: string
 }
 
@@ -58,7 +57,7 @@ const emit = defineEmits<{
 const { handleElement } = storeToRefs(useMainStore())
 const { slides, currentSlide } = storeToRefs(useSlidesStore())
 
-const type = ref<TypeKey>('web')
+const type = ref<ElementLinkType>('web')
 const address = ref('')
 const slideId = ref('')
 
diff --git a/src/views/Editor/Toolbar/ElementStylePanel/ImageStylePanel.vue b/src/views/Editor/Toolbar/ElementStylePanel/ImageStylePanel.vue
index fcfe29a9..71154449 100644
--- a/src/views/Editor/Toolbar/ElementStylePanel/ImageStylePanel.vue
+++ b/src/views/Editor/Toolbar/ElementStylePanel/ImageStylePanel.vue
@@ -255,8 +255,10 @@ const setBackgroundImage = () => {
   const background: SlideBackground = {
     ...currentSlide.value.background,
     type: 'image',
-    image: _handleElement.src,
-    imageSize: 'cover',
+    image: {
+      src: _handleElement.src,
+      size: 'cover'
+    },
   }
   slidesStore.updateSlide({ background })
   addHistorySnapshot()
diff --git a/src/views/Editor/Toolbar/ElementStylePanel/TableStylePanel.vue b/src/views/Editor/Toolbar/ElementStylePanel/TableStylePanel.vue
index 8925fa19..5d5e8ea4 100644
--- a/src/views/Editor/Toolbar/ElementStylePanel/TableStylePanel.vue
+++ b/src/views/Editor/Toolbar/ElementStylePanel/TableStylePanel.vue
@@ -84,7 +84,7 @@
       class="row" 
       button-style="solid" 
       :value="textAttrs.align"
-      @update:value="value => updateTextAttrs({ align: value as 'left' | 'center' | 'right' | 'justify' })"
+      @update:value="value => updateTextAttrs({ align: value as TextAlign })"
     >
       <RadioButton value="left" v-tooltip="'左对齐'" style="flex: 1;"><IconAlignTextLeft /></RadioButton>
       <RadioButton value="center" v-tooltip="'居中'" style="flex: 1;"><IconAlignTextCenter /></RadioButton>
@@ -173,7 +173,7 @@ import { computed, onMounted, ref, watch } from 'vue'
 import { storeToRefs } from 'pinia'
 import { nanoid } from 'nanoid'
 import { useMainStore, useSlidesStore } from '@/store'
-import type { PPTTableElement, TableCell, TableCellStyle, TableTheme } from '@/types/slides'
+import type { PPTTableElement, TableCell, TableCellStyle, TableTheme, TextAlign } from '@/types/slides'
 import { WEB_FONTS } from '@/configs/font'
 import useHistorySnapshot from '@/hooks/useHistorySnapshot'
 
diff --git a/src/views/Editor/Toolbar/SlideDesignPanel.vue b/src/views/Editor/Toolbar/SlideDesignPanel.vue
index 13be269f..6fe33468 100644
--- a/src/views/Editor/Toolbar/SlideDesignPanel.vue
+++ b/src/views/Editor/Toolbar/SlideDesignPanel.vue
@@ -26,8 +26,8 @@
 
       <Select 
         style="flex: 1;" 
-        :value="background.imageSize || 'cover'" 
-        @update:value="value => updateBackground({ imageSize: value as 'repeat' | 'cover' | 'contain' })"
+        :value="background.image?.size || 'cover'" 
+        @update:value="value => updateImageBackground({ size: value as SlideBackgroundImageSize })"
         v-else-if="background.type === 'image'"
         :options="[
           { label: '缩放', value: 'contain' },
@@ -51,7 +51,7 @@
     <div class="background-image-wrapper" v-if="background.type === 'image'">
       <FileInput @change="files => uploadBackgroundImage(files)">
         <div class="background-image">
-          <div class="content" :style="{ backgroundImage: `url(${background.image})` }">
+          <div class="content" :style="{ backgroundImage: `url(${background.image?.src})` }">
             <IconPlus />
           </div>
         </div>
@@ -301,7 +301,15 @@
 import { computed, ref } from 'vue'
 import { storeToRefs } from 'pinia'
 import { useMainStore, useSlidesStore } from '@/store'
-import type { Gradient, GradientType, SlideBackground, SlideTheme } from '@/types/slides'
+import type { 
+  Gradient,
+  GradientType,
+  SlideBackground,
+  SlideBackgroundType,
+  SlideTheme,
+  SlideBackgroundImage,
+  SlideBackgroundImageSize,
+} from '@/types/slides'
 import { PRESET_THEMES } from '@/configs/theme'
 import { WEB_FONTS } from '@/configs/font'
 import useHistorySnapshot from '@/hooks/useHistorySnapshot'
@@ -347,7 +355,7 @@ const {
 } = useSlideTheme()
 
 // 设置背景模式：纯色、图片、渐变色
-const updateBackgroundType = (type: 'solid' | 'image' | 'gradient') => {
+const updateBackgroundType = (type: SlideBackgroundType) => {
   if (type === 'solid') {
     const newBackground: SlideBackground = {
       ...background.value,
@@ -360,8 +368,10 @@ const updateBackgroundType = (type: 'solid' | 'image' | 'gradient') => {
     const newBackground: SlideBackground = {
       ...background.value,
       type: 'image',
-      image: background.value.image || '',
-      imageSize: background.value.imageSize || 'cover',
+      image: background.value.image || {
+        src: '',
+        size: 'cover',
+      },
     }
     slidesStore.updateSlide({ background: newBackground })
   }
@@ -401,11 +411,16 @@ const updateGradientBackgroundColors = (color: string) => {
   updateGradientBackground({ colors })
 }
 
+// 设置图片背景
+const updateImageBackground = (props: Partial<SlideBackgroundImage>) => {
+  updateBackground({ image: { ...background.value.image!, ...props } })
+}
+
 // 上传背景图片
 const uploadBackgroundImage = (files: FileList) => {
   const imageFile = files[0]
   if (!imageFile) return
-  getImageDataURL(imageFile).then(dataURL => updateBackground({ image: dataURL }))
+  getImageDataURL(imageFile).then(dataURL => updateImageBackground({ src: dataURL }))
 }
 
 // 应用当前页背景到全部页面