diff --git a/backend/competition/admin.py b/backend/competition/admin.py
index 5f1525d..aa4c63e 100644
--- a/backend/competition/admin.py
+++ b/backend/competition/admin.py
@@ -54,7 +54,7 @@ class CompetitionAdmin(ModelAdmin):
             'fields': ('start_time', 'end_time', 'status', 'project_visibility', 'allow_contestant_grading', 'is_active')
         }),
         ('评分配置', {
-            'fields': ('score_calculation_type', 'custom_score_formula', 'active_formula'),
+            'fields': ('score_calculation_type', 'active_formula'),
             'description': '配置得分计算方式：默认加权平均或使用评分公式'
         }),
     )
@@ -183,7 +183,7 @@ class ScoreFormulaAdmin(ModelAdmin):
         }),
         ('公式配置', {
             'fields': ('formula',),
-            'description': '使用维度名称作为变量，例如: 创新性 * 0.3 + 实用性 * 0.5 + 演示效果 * 0.2'
+            'description': '使用 dimension_X 作为变量（X为维度ID），例如: (dimension_1 + dimension_2) / 2'
         }),
         ('公式设置', {
             'fields': ('is_active', 'is_default')
diff --git a/backend/competition/migrations/0010_remove_competition_custom_score_formula.py b/backend/competition/migrations/0010_remove_competition_custom_score_formula.py
new file mode 100644
index 0000000..ce8f0db
--- /dev/null
+++ b/backend/competition/migrations/0010_remove_competition_custom_score_formula.py
@@ -0,0 +1,17 @@
+# Generated by Django 6.0.1 on 2026-03-20 06:19
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('competition', '0009_competition_active_formula_and_more'),
+    ]
+
+    operations = [
+        migrations.RemoveField(
+            model_name='competition',
+            name='custom_score_formula',
+        ),
+    ]
diff --git a/backend/competition/models.py b/backend/competition/models.py
index fa171c3..1d923d3 100644
--- a/backend/competition/models.py
+++ b/backend/competition/models.py
@@ -44,7 +44,6 @@ class Competition(models.Model):
     
     score_calculation_type = models.CharField(max_length=20, choices=SCORE_CALCULATION_CHOICES, default='default', verbose_name="得分计算方式")
     active_formula = models.ForeignKey('ScoreFormula', on_delete=models.SET_NULL, null=True, blank=True, related_name='active_competitions', verbose_name="启用的评分公式")
-    custom_score_formula = models.CharField(max_length=1000, blank=True, verbose_name="自定义得分算式", help_text="如使用自定义算式，将使用此公式计算最终得分。变量格式: dimension_维度ID，如 dimension_1, dimension_2")
     
     is_active = models.BooleanField(default=True, verbose_name="是否启用")
     created_at = models.DateTimeField(auto_now_add=True, verbose_name="创建时间")
@@ -178,14 +177,13 @@ class Project(models.Model):
     def calculate_score(self):
         """
         计算项目得分
-        支持三种模式：
+        支持两种模式：
         1. 默认加权平均：每个评委的得分 = sum(维度分数 × 维度权重)，然后所有评委取平均
         2. 使用评分公式：使用比赛关联的评分公式计算最终得分
-        3. 自定义算式（比赛级别）：使用比赛级别的 custom_score_formula 计算最终得分
         
-        自定义算式变量格式：
+        评分公式变量格式：
         - dimension_X: 第X个维度的平均分（所有评委对该维度的平均分）
-        - 也可以使用维度名称作为变量
+        - 例如: (dimension_1 + dimension_2) / 2
         """
         scores = self.scores.all()
         if not scores.exists():
@@ -198,9 +196,6 @@ class Project(models.Model):
         if competition.score_calculation_type == 'formula' and competition.active_formula:
             return self._calculate_formula_score(scores, competition.active_formula)
         
-        if competition.score_calculation_type == 'custom' and competition.custom_score_formula:
-            return self._calculate_custom_score(scores, competition.custom_score_formula)
-        
         return self._calculate_default_score(scores)
     
     def _calculate_default_score(self, scores):
@@ -230,10 +225,11 @@ class Project(models.Model):
         self.save()
         return avg_score
     
-    def _calculate_custom_score(self, scores, formula):
+    def _calculate_formula_score(self, scores, formula_obj):
         """
-        自定义算式模式（比赛级别）
-        使用比赛配置的自定义算式计算得分
+        公式配置模式（使用 ScoreFormula 模型）
+        使用公式配置中的公式计算得分
+        变量格式: dimension_X (X为维度ID)
         """
         dimension_scores = {}
         
@@ -243,36 +239,6 @@ class Project(models.Model):
             if dim_scores.exists():
                 avg = sum(float(s.score) for s in dim_scores) / dim_scores.count()
                 dimension_scores[f'dimension_{dimension.id}'] = avg
-                dimension_scores[dimension.name] = avg
-        
-        if not dimension_scores:
-            self.final_score = 0
-            self.save()
-            return 0
-        
-        try:
-            result = eval(formula, {"__builtins__": {}}, dimension_scores)
-            final_score = float(result)
-            self.final_score = round(final_score, 2)
-            self.save()
-            return self.final_score
-        except Exception as e:
-            print(f"算式计算错误: {e}, formula: {formula}, values: {dimension_scores}")
-            return self._calculate_default_score(scores)
-    
-    def _calculate_formula_score(self, scores, formula_obj):
-        """
-        公式配置模式（使用 ScoreFormula 模型）
-        使用公式配置中的公式计算得分
-        """
-        dimension_scores = {}
-        
-        dimensions = self.competition.score_dimensions.all()
-        for dimension in dimensions:
-            dim_scores = scores.filter(dimension=dimension)
-            if dim_scores.exists():
-                avg = sum(float(s.score) for s in dim_scores) / dim_scores.count()
-                dimension_scores[dimension.name] = avg
         
         if not dimension_scores:
             self.final_score = 0