diff --git a/src/api/his.ts b/src/api/his.ts
index e0d294c..b448410 100644
--- a/src/api/his.ts
+++ b/src/api/his.ts
@@ -110,9 +110,17 @@ export const getCustomerDetail = (
 export const signInMedicalExamCenter = (
   data: InputMedicalExamCenterSignIn
 ): Promise<PhysicalExamSignInResponse> => {
+  const formData = new FormData();
+  formData.append('id_no_pic', data.id_no_pic);
+  
   return request.post<PhysicalExamSignInResponse>(
     `${MEDICAL_EXAM_BASE_PATH}/sign-in`,
-    data
+    formData,
+    {
+      headers: {
+        'Content-Type': 'multipart/form-data',
+      },
+    }
   ).then(res => res.data);
 };
 
diff --git a/src/api/types.ts b/src/api/types.ts
index cf54970..e4bb2cb 100644
--- a/src/api/types.ts
+++ b/src/api/types.ts
@@ -255,8 +255,8 @@ export type CustomerDetailResponse = CommonActionResult<OutputCustomerDetail>;
  * 体检中心签到入参
  */
 export interface InputMedicalExamCenterSignIn {
-  /** 身份证号 */
-  id_no: string;
+  /** 身份证件照片（格式：jpg） */
+  id_no_pic: File | Blob;
 }
 
 /**
diff --git a/src/components/exam/ExamModal.tsx b/src/components/exam/ExamModal.tsx
index a8489e4..12c6a04 100644
--- a/src/components/exam/ExamModal.tsx
+++ b/src/components/exam/ExamModal.tsx
@@ -178,8 +178,9 @@ export const ExamModal = ({ client, tab, onTabChange, onClose }: ExamModalProps)
 };
 
 const ExamSignPanel = ({ examId }: { examId?: number }) => {
-  const [idNo, setIdNo] = useState('');
-  const [ocrLoading, setOcrLoading] = useState(false);
+  const [idCardFile, setIdCardFile] = useState<File | null>(null);
+  const [previewImage, setPreviewImage] = useState<string | null>(null);
+  const [showImagePreview, setShowImagePreview] = useState(false);
   const [signLoading, setSignLoading] = useState(false);
   const [message, setMessage] = useState<string | null>(null);
   const fileInputRef = useRef<HTMLInputElement | null>(null);
@@ -214,40 +215,78 @@ const ExamSignPanel = ({ examId }: { examId?: number }) => {
     }
   }, []);
 
-  const mockOcr = async (file: File) => {
-    // 简单模拟 OCR：提取文件名中的数字，或返回示例身份证
-    const match = file.name.match(/\d{6,18}/);
-    await new Promise((r) => setTimeout(r, 600));
-    return match?.[0] || '440101199001010010';
+  const convertToJpg = async (file: File): Promise<File> => {
+    return new Promise((resolve, reject) => {
+      const reader = new FileReader();
+      reader.onload = (event) => {
+        const img = new Image();
+        img.onload = () => {
+          const canvas = document.createElement('canvas');
+          canvas.width = img.width;
+          canvas.height = img.height;
+          const ctx = canvas.getContext('2d');
+          if (!ctx) {
+            reject(new Error('无法创建画布上下文'));
+            return;
+          }
+          ctx.drawImage(img, 0, 0);
+          canvas.toBlob(
+            (blob) => {
+              if (!blob) {
+                reject(new Error('图片转换失败'));
+                return;
+              }
+              const jpgFile = new File([blob], 'id_card.jpg', { type: 'image/jpeg' });
+              resolve(jpgFile);
+            },
+            'image/jpeg',
+            0.92 // 质量 92%
+          );
+        };
+        img.onerror = () => reject(new Error('图片加载失败'));
+        img.src = event.target?.result as string;
+      };
+      reader.onerror = () => reject(new Error('文件读取失败'));
+      reader.readAsDataURL(file);
+    });
   };
 
   const handleFileChange = async (e: React.ChangeEvent<HTMLInputElement>) => {
     const file = e.target.files?.[0];
     if (!file) return;
-    setOcrLoading(true);
+
     setMessage(null);
+
     try {
-      const ocrId = await mockOcr(file);
-      setIdNo(ocrId);
+      // 转换为 JPG 格式
+      const jpgFile = await convertToJpg(file);
+
+      // 保存文件用于签到
+      setIdCardFile(jpgFile);
+
+      // 生成预览图
+      const reader = new FileReader();
+      reader.onload = (event) => {
+        setPreviewImage(event.target?.result as string);
+      };
+      reader.readAsDataURL(jpgFile);
     } catch (err) {
-      console.error(err);
-      setMessage('OCR 识别失败，请重试或手动输入');
-    } finally {
-      setOcrLoading(false);
-      e.target.value = '';
+      console.error('图片转换失败', err);
+      setMessage('图片处理失败，请重试');
     }
+
+    e.target.value = '';
   };
 
   const handleSign = async () => {
-    const trimmed = idNo.trim();
-    if (!trimmed) {
-      setMessage('请输入身份证号');
+    if (!idCardFile) {
+      setMessage('请先上传身份证照片');
       return;
     }
     setSignLoading(true);
     setMessage(null);
     try {
-      const res = await signInMedicalExamCenter({ id_no: trimmed });
+      const res = await signInMedicalExamCenter({ id_no_pic: idCardFile });
       const ok = res.Status === 200 && res.Data?.is_success === 0;
       setMessage(ok ? '签到成功' : res.Message || '签到失败');
     } catch (err) {
@@ -339,38 +378,72 @@ const ExamSignPanel = ({ examId }: { examId?: number }) => {
   return (
     <div className='grid grid-cols-2 gap-4 text-sm'>
       <div className='p-4 rounded-2xl border bg-gray-50/60 flex flex-col gap-3'>
-        <div className='font-medium'>身份证扫描与签到</div>
+        <div className='font-medium'>身份证拍照与签到</div>
         <div className='text-xs text-gray-500'>
-          支持扫描身份证识别证号，确认后再点击签到。
+          拍照身份证后点击签到按钮完成签到。
         </div>
         <div className='flex items-center gap-3'>
-          <Button className='py-1.5 px-3' onClick={handlePickFile} disabled={ocrLoading || signLoading}>
-            {ocrLoading ? '识别中...' : '扫描身份证'}
+          <Button
+            className='py-1.5 px-3'
+            onClick={handlePickFile}
+            disabled={signLoading}
+          >
+            {idCardFile ? '重新拍照' : '拍照'}
           </Button>
           <input
             ref={fileInputRef}
             type='file'
             accept='image/*'
+            capture='environment'
             className='hidden'
             onChange={handleFileChange}
           />
-          <Input
-            placeholder='身份证号'
-            value={idNo}
-            onChange={(e) => setIdNo(e.target.value)}
-            className='flex-1'
-          />
+          {previewImage && (
+            <div
+              className='w-16 h-16 rounded-lg border-2 border-gray-300 overflow-hidden cursor-pointer hover:border-blue-500 transition-colors'
+              onClick={() => setShowImagePreview(true)}
+            >
+              <img
+                src={previewImage}
+                alt='身份证预览'
+                className='w-full h-full object-cover'
+              />
+            </div>
+          )}
           <Button
-            className='py-1.5 px-4'
+            className='py-1.5 px-4 flex-1'
             onClick={handleSign}
-            disabled={signLoading}
+            disabled={signLoading || !idCardFile}
           >
             {signLoading ? '签到中...' : '签到'}
           </Button>
         </div>
-        {message && <div className='text-xs text-gray-600'>{message}</div>}
-        <div className='text-[11px] text-gray-400'>如识别不准，可手动修改后再签到。</div>
+        {message && (
+          <div className={`text-xs ${message.includes('成功') ? 'text-green-600' : 'text-amber-600'}`}>
+            {message}
+          </div>
+        )}
       </div>
+      {showImagePreview && previewImage && (
+        <div
+          className='fixed inset-0 z-[80] bg-black/90 flex items-center justify-center p-6'
+          onClick={() => setShowImagePreview(false)}
+        >
+          <div className='relative max-w-full max-h-full'>
+            <img
+              src={previewImage}
+              alt='身份证预览'
+              className='max-w-full max-h-[90vh] object-contain'
+            />
+            <Button
+              className='absolute top-4 right-4 bg-white/90 hover:bg-white'
+              onClick={() => setShowImagePreview(false)}
+            >
+              关闭
+            </Button>
+          </div>
+        </div>
+      )}
       <div className='p-4 rounded-2xl border bg-gray-50/60 flex flex-col gap-3'>
         <div className='font-medium'>体检知情同意书</div>
         <div className='text-xs text-gray-500'>点击后弹出知情同意书全文及签名区域，签署完成后回到签到页面。</div>