diff --git a/app/Models/CourseSign.php b/app/Models/CourseSign.php
index e8a0eec..9b328af 100755
--- a/app/Models/CourseSign.php
+++ b/app/Models/CourseSign.php
@@ -86,7 +86,7 @@ class CourseSign extends SoftDeletesModel
                 if (isset($area)) {
                     if ($area == '苏州市外') {
                         $allArea = ParameterDetail::where('parameter_id', 5)->get();
-                        $query->whereNotIn('company_area', $allArea->pluck('value'))->orWhereNull('company_area');
+                        $query->whereNotIn('company_area', $allArea->pluck('value'));
                     } else {
                         $query->where('company_area', $area);
                     }
@@ -114,7 +114,7 @@ class CourseSign extends SoftDeletesModel
                 if ($area) {
                     if ($area == '苏州市外') {
                         $allArea = ParameterDetail::where('parameter_id', 5)->get();
-                        $query->whereNotIn('company_area', $allArea->pluck('value'))->orWhereNull('company_area');
+                        $query->whereNotIn('company_area', $allArea->pluck('value'));
                     } else {
                         $query->where('company_area', $area);
                     }