diff --git a/src/views/enforce/sign.vue b/src/views/enforce/sign.vue
index add67e9..07eacd9 100644
--- a/src/views/enforce/sign.vue
+++ b/src/views/enforce/sign.vue
@@ -843,6 +843,32 @@ const beforeRead = (file) =>{
       });
       return true;
     }
+    const getBeforeDate = (num, time) =>{
+            let n = num;
+            let d = '';
+            if(time) {
+                d = new Date(time);
+            } else {
+                d = new Date();
+            }
+            let year = d.getFullYear();
+            let mon = d.getMonth() + 1;
+            let day = d.getDate();
+            if(day <= n) {
+                if(mon > 1) {
+                    mon = mon - 1;
+                } else {
+                    year = year - 1;
+                    mon = 12;
+                }
+            }
+            d.setDate(d.getDate() - n);
+            year = d.getFullYear();
+            mon = d.getMonth() + 1;
+            day = d.getDate();
+            let s = year + "-" + (mon < 10 ? ('0' + mon) : mon) + "-" + (day < 10 ? ('0' + day) : day);
+            return s;
+        }
 </script>
 
 <style lang="less" scoped>