diff --git a/src/api/admin/types.ts b/src/api/admin/types.ts
index a1edd4e..10cfff7 100644
--- a/src/api/admin/types.ts
+++ b/src/api/admin/types.ts
@@ -139,7 +139,13 @@ export interface AdminApplicationReviewScoreRow {
 
 export interface AdminApplicationDetail extends AdminApplicationRow {
   competition: { id: number; slug: string; name: string }
-  participant: { id: number | null; mobile: string | null; name: string | null; email: string | null }
+  participant: {
+    id: number | null
+    mobile: string | null
+    name: string | null
+    email: string | null
+    company: string | null
+  }
   contact_email: string
   degree: string
   company_name: string
diff --git a/src/components/admin/FormSchemaVisualEditor.vue b/src/components/admin/FormSchemaVisualEditor.vue
index fa8d4aa..e2d4bc7 100644
--- a/src/components/admin/FormSchemaVisualEditor.vue
+++ b/src/components/admin/FormSchemaVisualEditor.vue
@@ -82,10 +82,23 @@ function applyOptionsText(element: FormSchemaEditorItem, raw: string) {
     })
     .filter((x): x is { label: string; value: string } => x != null)
 }
+
+function prefillSourceLabel(value?: string) {
+  return SIGNUP_PREFILL_SOURCES.find((src) => src.value === value)?.label ?? '不设置预填'
+}
 </script>
 
 <template>
   <div class="form-schema-visual-editor">
+    <el-alert
+      v-if="purpose === 'signup'"
+      type="info"
+      :closable="false"
+      class="prefill-rule-alert"
+      title="报名侧预填对照关系由后端配置"
+      description="在每个报名字段中设置「预填对照关系」。选手进入报名页加载当前报名记录时，后端只会在该报名字段为空时按对照关系补值，已填写或已保存的内容不会被覆盖。"
+    />
+
     <div class="toolbar">
       <el-button type="primary" @click="addField">添加字段</el-button>
       <span class="hint">拖拽左侧把手调整顺序</span>
@@ -140,18 +153,44 @@ function applyOptionsText(element: FormSchemaEditorItem, raw: string) {
                 </el-col>
                 <el-col
                   v-if="purpose === 'signup' && element.type !== 'file' && element.type !== SIGNUP_COMMITMENT_TYPE"
-                  :xs="24"
-                  :sm="12"
+                  :span="24"
                 >
-                  <div class="field-label">空值预填</div>
-                  <el-select v-model="element.prefillFrom" class="w-100">
-                    <el-option
-                      v-for="src in SIGNUP_PREFILL_SOURCES"
-                      :key="src.value"
-                      :label="src.label"
-                      :value="src.value"
-                    />
-                  </el-select>
+                  <div class="prefill-mapping">
+                    <div class="prefill-mapping-header">
+                      <span>预填对照关系</span>
+                      <el-tag size="small" :type="element.prefillFrom ? 'success' : 'info'" effect="plain">
+                        {{ element.prefillFrom ? '已设置' : '未设置' }}
+                      </el-tag>
+                    </div>
+                    <p class="prefill-mapping-desc">
+                      后端将报名字段 <code>{{ element.key || '未填写 key' }}</code> 对照到指定用户资料来源；
+                      报名侧只消费后端返回值，且仅空值时补入。
+                    </p>
+                    <el-row :gutter="12">
+                      <el-col :xs="24" :sm="12">
+                        <div class="field-label">目标报名字段（schema key）</div>
+                        <el-input :model-value="element.key" disabled placeholder="请先填写字段 key" />
+                      </el-col>
+                      <el-col :xs="24" :sm="12">
+                        <div class="field-label">来源用户资料（prefill_from）</div>
+                        <el-select v-model="element.prefillFrom" class="w-100">
+                          <el-option
+                            v-for="src in SIGNUP_PREFILL_SOURCES"
+                            :key="src.value"
+                            :label="src.label"
+                            :value="src.value"
+                          />
+                        </el-select>
+                      </el-col>
+                    </el-row>
+                    <div class="prefill-mapping-result">
+                      <span>当前关系：</span>
+                      <code>{{ element.key || '报名字段 key' }}</code>
+                      <span> ← </span>
+                      <code>{{ element.prefillFrom || '未绑定来源' }}</code>
+                      <span class="prefill-source-label">{{ prefillSourceLabel(element.prefillFrom) }}</span>
+                    </div>
+                  </div>
                 </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>
@@ -223,6 +262,10 @@ function applyOptionsText(element: FormSchemaEditorItem, raw: string) {
   margin-bottom: 12px;
 }
 
+.prefill-rule-alert {
+  margin-bottom: 12px;
+}
+
 .toolbar .hint {
   font-size: 12px;
   color: var(--el-text-color-secondary);
@@ -272,6 +315,55 @@ function applyOptionsText(element: FormSchemaEditorItem, raw: string) {
   margin-bottom: 4px;
 }
 
+.prefill-mapping {
+  border: 1px solid var(--el-border-color);
+  border-radius: 6px;
+  background: var(--el-fill-color-lighter);
+  padding: 10px 12px;
+}
+
+.prefill-mapping-header {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: 12px;
+  margin-bottom: 6px;
+  font-size: 13px;
+  font-weight: 600;
+  color: var(--el-text-color-primary);
+}
+
+.prefill-mapping-desc {
+  margin: 0 0 10px;
+  color: var(--el-text-color-secondary);
+  font-size: 12px;
+  line-height: 1.6;
+}
+
+.prefill-mapping-result {
+  display: flex;
+  align-items: center;
+  flex-wrap: wrap;
+  gap: 4px;
+  margin-top: 8px;
+  color: var(--el-text-color-secondary);
+  font-size: 12px;
+  line-height: 1.6;
+}
+
+.prefill-source-label {
+  margin-left: 4px;
+}
+
+code {
+  border-radius: 4px;
+  background: var(--el-fill-color);
+  padding: 1px 5px;
+  color: var(--el-color-primary);
+  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
+  font-size: 12px;
+}
+
 .field-actions {
   display: flex;
   flex-wrap: wrap;
diff --git a/src/utils/defaultSignupFormSchema.ts b/src/utils/defaultSignupFormSchema.ts
index 261a2a8..c998d69 100644
--- a/src/utils/defaultSignupFormSchema.ts
+++ b/src/utils/defaultSignupFormSchema.ts
@@ -12,7 +12,7 @@ export interface SignupFormSchemaField {
   placeholder?: string
   help?: string
   options?: { label: string; value: string }[]
-  /** 字段为空时从静态资料源预填；当前后端支持 user.name / user.mobile / user.email */
+  /** 字段为空时从静态资料源预填；当前后端支持 user.name / user.mobile / user.email / user.company */
   prefill_from?: 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[] }
@@ -79,6 +79,7 @@ export const DEFAULT_SIGNUP_FORM_SCHEMA: SignupFormSchemaField[] = [
     required: false,
     required_when: { field: 'entry_group', values: ['创业组'] },
     placeholder: '请填写工商注册全称',
+    prefill_from: 'user.company',
   },
   { key: 'project_name', type: 'text', label: '项目名称', required: true },
   {
diff --git a/src/utils/formSchemaEditor.ts b/src/utils/formSchemaEditor.ts
index dd0df2f..7d80753 100644
--- a/src/utils/formSchemaEditor.ts
+++ b/src/utils/formSchemaEditor.ts
@@ -50,10 +50,11 @@ export const REVIEW_FIELD_TYPES: { value: string; label: string }[] = [
 ]
 
 export const SIGNUP_PREFILL_SOURCES: { value: string; label: string }[] = [
-  { value: '', label: '不绑定' },
-  { value: 'user.name', label: '用户姓名' },
-  { value: 'user.mobile', label: '用户手机号' },
-  { value: 'user.email', label: '用户邮箱' },
+  { value: '', label: '不设置预填' },
+  { value: 'user.name', label: '用户资料：姓名（users.name）' },
+  { value: 'user.mobile', label: '用户资料：手机号（users.mobile）' },
+  { value: 'user.email', label: '用户资料：邮箱（users.email）' },
+  { value: 'user.company', label: '用户资料：公司（users.company）' },
 ]
 
 function newUid(): string {