diff --git a/yuthon_salary/wizard/salary_compute_wizard.py b/yuthon_salary/wizard/salary_compute_wizard.py
index 5bfbba7d3..24025c7cc 100644
--- a/yuthon_salary/wizard/salary_compute_wizard.py
+++ b/yuthon_salary/wizard/salary_compute_wizard.py
@@ -148,8 +148,6 @@ class SalaryComputeWizard(models.Model):
                                     result = line.total * internship_days / days + line.total * work_days / days
                                 else:
                                     result = line.total * internship_days / days
-                            elif field_name == 'union_dues':
-                                result = line.total
                             elif field_name in ['rank_salary', 'base_salary']:
                                 int_value = int(line.total)
                                 ones_digit = int_value % 10
@@ -161,6 +159,9 @@ class SalaryComputeWizard(models.Model):
                                     result = rounded_value * 0.8 * internship_days / days + rounded_value * work_days / days
                                 else:
                                     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
                             else:
                                 if work_days != days:
                                     result = line.total * 0.8 * internship_days / days + line.total * work_days / days