diff --git a/yuthon_salary/wizard/salary_compute_wizard.py b/yuthon_salary/wizard/salary_compute_wizard.py
index 005761ef4..6620581a2 100644
--- a/yuthon_salary/wizard/salary_compute_wizard.py
+++ b/yuthon_salary/wizard/salary_compute_wizard.py
@@ -160,7 +160,7 @@ class SalaryComputeWizard(models.Model):
                                     result = rounded_value * 0.8 * internship_days / days
                             elif field_name == 'union_dues':  # 单独处理工会会费
                                 base_salary = getattr(internship_id, 'base_salary', 0)
-                                result = base_salary / 0.8 * 0.05
+                                result = base_salary * 0.005
                             else:
                                 if work_days != days:
                                     result = line.total * 0.8 * internship_days / days + line.total * work_days / days