diff --git a/src/components/admin/FormSchemaVisualEditor.vue b/src/components/admin/FormSchemaVisualEditor.vue
index bcd84d6..83e917c 100644
--- a/src/components/admin/FormSchemaVisualEditor.vue
+++ b/src/components/admin/FormSchemaVisualEditor.vue
@@ -133,6 +133,19 @@ function applyOptionsText(element: FormSchemaEditorItem, raw: string) {
                   <div class="field-label">填报说明</div>
                   <el-input v-model="element.help" placeholder="可选，展示在表单项下方" />
                 </el-col>
+                <el-col v-if="purpose === 'signup' && element.type === 'file'" :span="24">
+                  <div class="field-label">文件格式限制（可选）</div>
+                  <el-input
+                    v-model="element.fileExtensionsLines"
+                    type="textarea"
+                    :rows="2"
+                    placeholder="每行一个扩展名（不含点），如 pdf；不填则不额外收紧（仍仅能上传系统全局允许的格式）"
+                  />
+                </el-col>
+                <el-col v-if="purpose === 'signup' && element.type === 'file'" :xs="24" :sm="8">
+                  <div class="field-label">最多上传文件数（可选）</div>
+                  <el-input v-model="element.fileMaxCount" placeholder="不填则不限制个数" inputmode="numeric" />
+                </el-col>
                 <el-col v-if="element.type === 'select'" :span="24">
                   <div class="field-label">选项（每行：显示文本|值）</div>
                   <el-input
diff --git a/src/utils/defaultSignupFormSchema.ts b/src/utils/defaultSignupFormSchema.ts
index 94ac771..7e80f0e 100644
--- a/src/utils/defaultSignupFormSchema.ts
+++ b/src/utils/defaultSignupFormSchema.ts
@@ -14,8 +14,24 @@ export interface SignupFormSchemaField {
   options?: { label: string; value: string }[]
   /** 当依赖字段取值命中列表时，本字段视为必填（与企业名称依赖参赛组别一致） */
   required_when?: { field: string; values: string[] }
+  /** 报名表文件字段：允许的扩展名（不含点，小写）；未配置则使用系统默认白名单 */
+  file_extensions?: string[]
+  /** 报名表文件字段：最多文件数；未配置或小于 1 表示不限制 */
+  file_max_count?: number
 }
 
+/** 与 Laravel `config/contest.file_mimes` 一致：schema 未配置 `file_extensions` 时沿用此白名单 */
+export const CONTEST_DEFAULT_FILE_EXTENSIONS: readonly string[] = [
+  'pdf',
+  'ppt',
+  'pptx',
+  'doc',
+  'docx',
+  'wps',
+  'rar',
+  'zip',
+]
+
 /**
  * 主题赛道选项仅来自公开接口 `tracks`（赛事启用赛道），报名表 schema 中 track 可不配 options。
  */
@@ -139,6 +155,32 @@ function parseSchemaOptionsArray(raw: unknown): { label: string; value: string }
     )
 }
 
+function parseFileExtensionsFromUnknown(raw: unknown): string[] | undefined {
+  if (raw == null) return undefined
+  if (Array.isArray(raw)) {
+    const parts = raw
+      .map((x) => String(x).trim().toLowerCase().replace(/^\./, ''))
+      .filter((s) => s !== '')
+    return parts.length ? [...new Set(parts)] : undefined
+  }
+  if (typeof raw === 'string') {
+    const parts = raw
+      .split(/[,;\s|]+/)
+      .map((s) => s.trim().toLowerCase().replace(/^\./, ''))
+      .filter((s) => s !== '')
+    return parts.length ? [...new Set(parts)] : undefined
+  }
+  return undefined
+}
+
+function parseFileMaxCountFromUnknown(raw: unknown): number | undefined {
+  if (raw == null || raw === '') return undefined
+  const n = typeof raw === 'number' ? raw : parseInt(String(raw), 10)
+  if (!Number.isFinite(n)) return undefined
+  const i = Math.floor(n)
+  return i >= 1 ? i : undefined
+}
+
 export function normalizeSignupSchema(raw: unknown): SignupFormSchemaField[] {
   if (!Array.isArray(raw) || raw.length === 0) {
     return DEFAULT_SIGNUP_FORM_SCHEMA.map((f) => ({ ...f, options: f.options ? [...f.options] : undefined }))
@@ -193,7 +235,25 @@ export function normalizeSignupSchema(raw: unknown): SignupFormSchemaField[] {
         }
       }
     }
-    out.push({ key, type, label, title_supplement, required, placeholder, help, options, required_when })
+    let file_extensions: string[] | undefined
+    let file_max_count: number | undefined
+    if (type === 'file') {
+      file_extensions = parseFileExtensionsFromUnknown(o.file_extensions)
+      file_max_count = parseFileMaxCountFromUnknown(o.file_max_count)
+    }
+    out.push({
+      key,
+      type,
+      label,
+      title_supplement,
+      required,
+      placeholder,
+      help,
+      options,
+      required_when,
+      file_extensions,
+      file_max_count,
+    })
   }
   return out.length ? out : DEFAULT_SIGNUP_FORM_SCHEMA.map((f) => ({ ...f }))
 }
diff --git a/src/utils/formSchemaEditor.ts b/src/utils/formSchemaEditor.ts
index c433b17..ec80714 100644
--- a/src/utils/formSchemaEditor.ts
+++ b/src/utils/formSchemaEditor.ts
@@ -19,6 +19,10 @@ export interface FormSchemaEditorItem {
   requiredWhenField?: string
   /** 报名表：依赖取值，每行一个（入库为 required_when.values） */
   requiredWhenValuesLines?: string
+  /** 文件字段：每行一个扩展名不含点 */
+  fileExtensionsLines?: string
+  /** 文件字段：最多文件数，空为不限制 */
+  fileMaxCount?: string
 }
 
 /** 入库时为 checkbox + key commitment_accepted，仅供报名表可视化 */
@@ -64,6 +68,8 @@ export function createEmptySchemaItem(
     options: [],
     requiredWhenField: '',
     requiredWhenValuesLines: '',
+    fileExtensionsLines: '',
+    fileMaxCount: '',
   }
 }
 
@@ -119,6 +125,27 @@ export function schemaJsonToEditorItems(json: unknown, purpose: FormSchemaPurpos
       options: type === 'select' ? normalizeOptions(o.options) : [],
       requiredWhenField,
       requiredWhenValuesLines,
+      fileExtensionsLines: (() => {
+        if (type !== 'file') return ''
+        const fe = o.file_extensions
+        if (!Array.isArray(fe)) return ''
+        const lines = fe
+          .map((x) =>
+            String(x)
+              .trim()
+              .toLowerCase()
+              .replace(/^\./, ''),
+          )
+          .filter(Boolean)
+        return lines.join('\n')
+      })(),
+      fileMaxCount: (() => {
+        if (type !== 'file') return ''
+        const mc = o.file_max_count
+        if (mc == null || mc === '') return ''
+        const n = typeof mc === 'number' ? mc : parseInt(String(mc), 10)
+        return Number.isFinite(n) && n >= 1 ? String(Math.floor(n)) : ''
+      })(),
     }
   })
 }
@@ -136,6 +163,20 @@ export function editorItemsToSchemaJson(items: FormSchemaEditorItem[], purpose:
     if (item.placeholder?.trim()) row.placeholder = item.placeholder.trim()
     if (item.help?.trim()) row.help = item.help.trim()
     if (item.titleSupplement?.trim()) row.title_supplement = item.titleSupplement.trim()
+    if (item.type === 'file') {
+      const extLines = String(item.fileExtensionsLines ?? '')
+        .split('\n')
+        .map((s) =>
+          s
+            .trim()
+            .toLowerCase()
+            .replace(/^\./, ''),
+        )
+        .filter(Boolean)
+      if (extLines.length) row.file_extensions = [...new Set(extLines)]
+      const mc = parseInt(String(item.fileMaxCount ?? '').trim(), 10)
+      if (Number.isFinite(mc) && mc >= 1) row.file_max_count = mc
+    }
     if (item.type === 'select' && item.options?.length) {
       row.options = item.options.filter((o) => o.value !== '' || o.label !== '')
     }
diff --git a/src/views/ApplyFormView.vue b/src/views/ApplyFormView.vue
index a7e1975..ef6d2da 100644
--- a/src/views/ApplyFormView.vue
+++ b/src/views/ApplyFormView.vue
@@ -22,14 +22,17 @@ import {
   participantApplyPageTitle,
   type BrandingForm,
 } from '../utils/competitionBranding'
-import { normalizeSignupSchema, type SignupFormSchemaField } from '../utils/defaultSignupFormSchema'
+import {
+  CONTEST_DEFAULT_FILE_EXTENSIONS,
+  normalizeSignupSchema,
+  type SignupFormSchemaField,
+} from '../utils/defaultSignupFormSchema'
 
 const router = useRouter()
 const route = useRoute()
 
 const slug = computed(() => String(route.params.slug ?? '').trim())
 
-const allowedExt = ['pdf', 'ppt', 'pptx', 'doc', 'docx', 'wps', 'rar', 'zip']
 const maxFileSize = 20 * 1024 * 1024
 const MOBILE_PATTERN = '^1[3-9]\\d{9}$'
 
@@ -104,6 +107,46 @@ function goLogin() {
 }
 
 const schemaFields = ref<SignupFormSchemaField[]>(normalizeSignupSchema([]))
+
+/** schema 文件字段允许的扩展名（与 config/contest.file_mimes ∩ schema.file_extensions） */
+function effectiveFileExtensionsForField(field: SignupFormSchemaField | undefined): string[] {
+  const globe = CONTEST_DEFAULT_FILE_EXTENSIONS.map((e) => e.toLowerCase())
+  const globSet = new Set(globe)
+  const raw = field?.file_extensions
+  if (!Array.isArray(raw) || raw.length === 0) return [...globe]
+  const cleaned = [
+    ...new Set(
+      raw
+        .map((x) =>
+          String(x)
+            .trim()
+            .toLowerCase()
+            .replace(/^\./, ''),
+        )
+        .filter(Boolean)
+        .filter((e) => globSet.has(e)),
+    ),
+  ]
+  return cleaned.length > 0 ? cleaned : [...globe]
+}
+
+/** schema 配置了 file_max_count 时返回上限，否则不限 */
+function effectiveMaxFileCountForField(field: SignupFormSchemaField | undefined): number | null {
+  const n = field?.file_max_count
+  if (typeof n !== 'number' || !Number.isFinite(n)) return null
+  const i = Math.floor(n)
+  return i >= 1 ? i : null
+}
+
+function fileFieldSchema(target: 'plan' | 'supporting'): SignupFormSchemaField | undefined {
+  return schemaFields.value.find((f) => f.type === 'file' && f.key === target)
+}
+
+function fileInputAcceptAttr(field: SignupFormSchemaField | undefined): string {
+  return effectiveFileExtensionsForField(field)
+    .map((e) => '.' + e)
+    .join(',')
+}
 const competitionTracks = ref<PublicTrackRow[]>([])
 /** 赛事 /public API 已成功解析后为 true，避免 tracks 尚未返回时出现黄色提示闪烁 */
 const competitionHydrated = ref(false)
@@ -569,20 +612,29 @@ function validateFileItems(
   items: FileItem[],
   missingMessage: string,
   optional: boolean,
+  field?: SignupFormSchemaField,
 ): { ok: boolean; feedback: string } {
+  const allowed = effectiveFileExtensionsForField(field)
+  const maxCount = effectiveMaxFileCountForField(field)
   const realFiles = items.filter((i) => i.file)
   const serverOnly = items.filter((i) => i.fromServer && !i.file)
   if (!realFiles.length && !serverOnly.length) {
     return { ok: optional, feedback: optional ? '' : missingMessage }
   }
+  if (maxCount !== null && items.length > maxCount) {
+    return {
+      ok: false,
+      feedback: `最多可上传 ${maxCount} 个文件，请删除多余文件后重试`,
+    }
+  }
   const invalidExtFile = realFiles.map((i) => i.file!).find((file) => {
     const ext = (file.name.split('.').pop() || '').toLowerCase()
-    return !allowedExt.includes(ext)
+    return !allowed.includes(ext)
   })
   if (invalidExtFile) {
     return {
       ok: false,
-      feedback: `“${invalidExtFile.name}”格式不支持，请上传 PDF/PPT/PPTX/DOC/DOCX/WPS/RAR/ZIP`,
+      feedback: `“${invalidExtFile.name}”格式不支持，请上传 ${allowed.join('、')} 格式的文件`,
     }
   }
   const oversizedFile = realFiles.map((i) => i.file!).find((file) => file.size > maxFileSize)
@@ -605,7 +657,8 @@ function validatePlanFile() {
     templateRefEl(planFileInput)?.setCustomValidity('')
     return true
   }
-  const r = validateFileItems(planFileItems.value, '请上传商业计划书', false)
+  const planField = fileFieldSchema('plan')
+  const r = validateFileItems(planFileItems.value, '请上传商业计划书', false, planField)
   planFileFeedback.value = r.feedback
   templateRefEl(planFileInput)?.setCustomValidity(r.ok ? '' : 'missing')
   return r.ok
@@ -616,7 +669,8 @@ function validateSupportingFiles() {
     templateRefEl(supportingFileInput)?.setCustomValidity('')
     return true
   }
-  const r = validateFileItems(supportingFileItems.value, '文件格式或大小不符合要求', true)
+  const supField = fileFieldSchema('supporting')
+  const r = validateFileItems(supportingFileItems.value, '文件格式或大小不符合要求', true, supField)
   supportingFilesFeedback.value = r.feedback
   templateRefEl(supportingFileInput)?.setCustomValidity(r.ok ? '' : 'bad')
   return r.ok
@@ -733,8 +787,20 @@ async function removeFile(id: string | number, target: 'plan' | 'supporting') {
 
 function addFiles(fileList: FileList | null, target: 'plan' | 'supporting') {
   if (!fileList?.length) return
-  const items = target === 'plan' ? planFileItems.value : supportingFileItems.value
-  Array.from(fileList).forEach((file) => {
+  const field = fileFieldSchema(target)
+  const maxC = effectiveMaxFileCountForField(field)
+  const items = target === 'plan' ? [...planFileItems.value] : [...supportingFileItems.value]
+  let incoming = Array.from(fileList)
+  const room = maxC === null ? incoming.length : Math.max(0, maxC - items.length)
+  if (incoming.length > room && maxC !== null) {
+    showNotice(
+      `该栏最多上传 ${maxC} 个文件，已忽略多余 ${incoming.length - room} 个选择。`,
+      '提示',
+      'warning',
+    )
+  }
+  incoming = incoming.slice(0, room)
+  incoming.forEach((file) => {
     items.push({
       id: `tmp-${Date.now()}-${Math.random().toString(16).slice(2)}`,
       file,
@@ -1179,7 +1245,7 @@ onMounted(() => {
                 type="file"
                 class="form-control editable"
                 :class="{ 'is-invalid': wasValidated && !!planFileFeedback }"
-                accept=".pdf,.ppt,.pptx,.doc,.docx,.wps,.rar,.zip"
+                :accept="fileInputAcceptAttr(field)"
                 multiple
                 :disabled="formDisabled"
                 @change="addFiles(($event.target as HTMLInputElement).files, 'plan')"
@@ -1242,7 +1308,7 @@ onMounted(() => {
                 type="file"
                 class="form-control editable"
                 :class="{ 'is-invalid': wasValidated && !!supportingFilesFeedback }"
-                accept=".pdf,.ppt,.pptx,.doc,.docx,.wps,.rar,.zip"
+                :accept="fileInputAcceptAttr(field)"
                 multiple
                 :disabled="formDisabled"
                 @change="addFiles(($event.target as HTMLInputElement).files, 'supporting')"