diff --git a/src/views/contentManagement/upload/imagePresets.ts b/src/views/contentManagement/upload/imagePresets.ts
index 70d578e..8b2d366 100644
--- a/src/views/contentManagement/upload/imagePresets.ts
+++ b/src/views/contentManagement/upload/imagePresets.ts
@@ -46,6 +46,13 @@ export const BANNER_IMAGE: ImagePreset = {
   maxHeight: 1164
 }
 
+export const LOGIN_BACKGROUND: ImagePreset = {
+  label: '登录页背景',
+  hint: '建议 1170×2532（390×844dp × 3，iPhone 整屏竖图），min 720×1560',
+  maxWidth: 1170,
+  maxHeight: 2532
+}
+
 /** 按规格压缩：尺寸未超且体积不大时原样返回，不做二次编码。 */
 export function compressForPreset(file: File, preset: ImagePreset): Promise<File> {
   return compressImage(file, {
diff --git a/src/views/systemManagement/SettingsView.vue b/src/views/systemManagement/SettingsView.vue
index fac6141..9894eaf 100644
--- a/src/views/systemManagement/SettingsView.vue
+++ b/src/views/systemManagement/SettingsView.vue
@@ -1,9 +1,11 @@
 <!-- Author: fruit.com.cn -->
 
 <script setup>
-import { onMounted, ref } from 'vue'
+import { computed, onMounted, ref } from 'vue'
 import { ElMessage } from 'element-plus'
 import { listConfigsApi, updateConfigsApi } from '@/api/admin/config'
+import { uploadFile } from '@/utils/uploader'
+import { compressForPreset, LOGIN_BACKGROUND } from '@/views/contentManagement/upload/imagePresets'
 import { useRbac } from '@/stores/rbac'
 
 const { can } = useRbac()
@@ -14,6 +16,15 @@ const workspaceName = ref('')
 const defaultStatus = ref('draft')
 const registerMaxPerIp = ref(5)
 const registerMaxPerDevice = ref(3)
+const loginBackgroundUrl = ref('')
+
+const MAX_LOGIN_BG_SIZE = 8 * 1024 * 1024 // 8 MB
+const ALLOWED_LOGIN_BG_TYPES = ['image/jpeg', 'image/png', 'image/webp']
+const uploadingBg = ref(false)
+const bgError = ref('')
+const bgFileName = ref('')
+
+const canSave = computed(() => can('system:role'))
 
 const statusOptions = [
   { code: 'draft', text: '草稿' },
@@ -34,6 +45,7 @@ async function load() {
     defaultStatus.value = map['content.default-status'] || 'draft'
     registerMaxPerIp.value = parseRegisterLimit(map['app.register.max-per-ip-per-day'], 5)
     registerMaxPerDevice.value = parseRegisterLimit(map['app.register.max-per-device-per-day'], 3)
+    loginBackgroundUrl.value = map['app.login.background.url'] || ''
   } finally {
     loading.value = false
   }
@@ -46,7 +58,8 @@ async function save() {
       'workspace.name': workspaceName.value,
       'content.default-status': defaultStatus.value,
       'app.register.max-per-ip-per-day': String(registerMaxPerIp.value),
-      'app.register.max-per-device-per-day': String(registerMaxPerDevice.value)
+      'app.register.max-per-device-per-day': String(registerMaxPerDevice.value),
+      'app.login.background.url': loginBackgroundUrl.value
     })
     ElMessage.success('设置已保存')
   } finally {
@@ -54,6 +67,52 @@ async function save() {
   }
 }
 
+function beforeBgUpload(file) {
+  bgError.value = ''
+  if (!ALLOWED_LOGIN_BG_TYPES.includes(file.type)) {
+    bgError.value = '图片仅支持 JPG、PNG 或 WebP 格式'
+    return false
+  }
+  if (file.size > MAX_LOGIN_BG_SIZE) {
+    bgError.value = '图片大小不能超过 8MB'
+    return false
+  }
+  return true
+}
+
+async function uploadBg(options) {
+  uploadingBg.value = true
+  bgError.value = ''
+  try {
+    const file = await compressForPreset(options.file, LOGIN_BACKGROUND)
+    const asset = await uploadFile(file, {
+      bizType: 'LOGIN_BG'
+    })
+    loginBackgroundUrl.value = asset.url
+    bgFileName.value = file.name
+    ElMessage.success('登录页背景已上传')
+  } catch {
+    bgError.value = '图片上传失败，请检查网络后重试'
+  } finally {
+    uploadingBg.value = false
+  }
+}
+
+function removeBg() {
+  if (uploadingBg.value) return
+  loginBackgroundUrl.value = ''
+  bgFileName.value = ''
+  bgError.value = ''
+}
+
+const loginBgPreview = computed(() => {
+  const url = loginBackgroundUrl.value
+  if (!url) return ''
+  if (url.startsWith('http://') || url.startsWith('https://')) return url
+  if (url.startsWith('/')) return url
+  return `/${url}`
+})
+
 onMounted(load)
 </script>
 
@@ -78,9 +137,78 @@ onMounted(load)
         ><el-input-number v-model="registerMaxPerIp" :step="1" :precision="0" /></el-form-item
       ><el-form-item label="单设备 24 小时注册上限（0 或负数表示不限制）"
         ><el-input-number v-model="registerMaxPerDevice" :step="1" :precision="0" /></el-form-item
-      ><el-button type="primary" :loading="saving" :disabled="!can('system:role')" @click="save"
+      >
+      <el-divider content-position="left">App 登录页</el-divider>
+      <el-form-item label="登录页背景图">
+        <div class="login-bg-field">
+          <el-upload
+            :show-file-list="false"
+            :before-upload="beforeBgUpload"
+            :http-request="uploadBg"
+            accept=".jpg,.jpeg,.png,.webp"
+          >
+            <el-button :disabled="uploadingBg" :loading="uploadingBg">
+              {{ loginBackgroundUrl ? '重新上传' : '上传背景图' }}
+            </el-button>
+          </el-upload>
+          <span class="field-hint">建议 {{ LOGIN_BACKGROUND.hint }}</span>
+          <span v-if="bgFileName" class="field-filename">当前：{{ bgFileName }}</span>
+          <span v-if="bgError" class="field-error">{{ bgError }}</span>
+          <div v-if="loginBgPreview" class="login-bg-preview">
+            <img :src="loginBgPreview" alt="登录页背景预览" />
+            <el-button
+              class="remove-bg-btn"
+              text
+              type="danger"
+              size="small"
+              @click="removeBg"
+            >移除</el-button>
+          </div>
+        </div>
+      </el-form-item>
+      <el-button type="primary" :loading="saving" :disabled="!canSave" @click="save"
         >保存设置</el-button
       ></el-form
     ></section
   >
 </template>
+
+<style scoped>
+.login-bg-field {
+  display: flex;
+  flex-direction: column;
+  gap: 6px;
+}
+.field-hint {
+  font-size: 12px;
+  color: var(--el-text-color-secondary);
+}
+.field-filename {
+  font-size: 12px;
+  color: var(--el-text-color-primary);
+}
+.field-error {
+  font-size: 12px;
+  color: var(--el-color-danger);
+}
+.login-bg-preview {
+  position: relative;
+  margin-top: 4px;
+  width: 96px;
+  aspect-ratio: 1170 / 2532;
+  border-radius: 6px;
+  overflow: hidden;
+  background: var(--el-fill-color-light);
+}
+.login-bg-preview img {
+  width: 100%;
+  height: 100%;
+  object-fit: cover;
+}
+.remove-bg-btn {
+  position: absolute;
+  top: 2px;
+  right: 2px;
+  padding: 2px 4px;
+}
+</style>