diff --git a/src/components/exam/ExamSignPanel.tsx b/src/components/exam/ExamSignPanel.tsx
index 76d54e3..51fb7dc 100644
--- a/src/components/exam/ExamSignPanel.tsx
+++ b/src/components/exam/ExamSignPanel.tsx
@@ -299,7 +299,7 @@ export const ExamSignPanel = ({ examId, onBusyChange }: ExamSignPanelProps) => {
           if (examId) {
             refreshTijianPdfs(examId);
           }
-        }, 2000);
+        }, 500);
       } else {
         setSubmitMessage(res.Message || '签名提交失败');
       }
@@ -988,7 +988,7 @@ export const ExamSignPanel = ({ examId, onBusyChange }: ExamSignPanelProps) => {
           setDaojiandanSubmitMessage(null);
           daojiandanSignaturePadRef.current?.clear();
           setShowDaojiandanPreview(true);
-        }, 2000);
+        }, 500);
       } else {
         setDaojiandanSubmitMessage(res.Message || '签名提交失败');
       }
@@ -1018,6 +1018,9 @@ export const ExamSignPanel = ({ examId, onBusyChange }: ExamSignPanelProps) => {
       return;
     }
 
+    // 记录当前正在签名的加项单，用于签名成功后重新选中它
+    const justSignedCombinationCode = currentAddItemBill.combinationCode;
+
     setAddItemBillSubmitLoading(true);
     setAddItemBillSubmitMessage(null);
     try {
@@ -1050,8 +1053,13 @@ export const ExamSignPanel = ({ examId, onBusyChange }: ExamSignPanelProps) => {
                 is_signed: item.is_sign === 1,
               }));
               setAddItemBillList(addItemList);
+
+              // 优先选中刚刚签名的那一张，其次选未签名的，其次第一张
+              const justSigned = addItemList.find(
+                (bill) => bill.combinationCode === justSignedCombinationCode
+              );
               const unsigned = addItemList.find((bill) => bill.is_signed !== true);
-              setCurrentAddItemBill(unsigned || addItemList[0] || null);
+              setCurrentAddItemBill(justSigned || unsigned || addItemList[0] || null);
             } else {
               setAddItemBillList([]);
               setCurrentAddItemBill(null);
@@ -1066,7 +1074,7 @@ export const ExamSignPanel = ({ examId, onBusyChange }: ExamSignPanelProps) => {
           setAddItemBillSubmitMessage(null);
           addItemBillSignaturePadRef.current?.clear();
           setShowAddItemBillPreview(true);
-        }, 2000);
+        }, 500);
       } else {
         setAddItemBillSubmitMessage(res.Message || '签名提交失败');
       }