diff --git a/modules/calculation/src/main/java/com/thing/calculation/service/impl/CalcTargetConfigServiceImpl.java b/modules/calculation/src/main/java/com/thing/calculation/service/impl/CalcTargetConfigServiceImpl.java
index 2c4e277..95d42f8 100644
--- a/modules/calculation/src/main/java/com/thing/calculation/service/impl/CalcTargetConfigServiceImpl.java
+++ b/modules/calculation/src/main/java/com/thing/calculation/service/impl/CalcTargetConfigServiceImpl.java
@@ -1,14 +1,11 @@
 package com.thing.calculation.service.impl;
 
-import static com.thing.calculation.entity.table.CalcTargetConfigEntityTableDef.CALC_TARGET_CONFIG_ENTITY;
-
+import cn.hutool.core.collection.CollectionUtil;
 import cn.hutool.core.util.ObjectUtil;
-
 import com.mybatisflex.core.query.QueryWrapper;
 import com.thing.calculation.dto.*;
 import com.thing.calculation.entity.CalcSourceConfigEntity;
 import com.thing.calculation.entity.CalcTargetConfigEntity;
-import com.thing.calculation.entity.table.CalcTargetConfigEntityTableDef;
 import com.thing.calculation.enumeration.CalcConfigType;
 import com.thing.calculation.excel.CalcConfigExcel;
 import com.thing.calculation.excel.CalculationTypeExcel;
@@ -31,11 +28,8 @@ import com.thing.common.orm.service.impl.BaseServiceImpl;
 import com.thing.common.orm.utils.IdGenerator;
 import com.thing.common.tskv.service.TsKvService;
 import com.thing.sys.security.context.UserContext;
-
 import jakarta.servlet.http.HttpServletResponse;
-
 import lombok.RequiredArgsConstructor;
-
 import org.apache.commons.collections4.MapUtils;
 import org.apache.commons.lang3.StringUtils;
 import org.springframework.cache.annotation.CacheEvict;
@@ -50,6 +44,8 @@ import java.util.function.Consumer;
 import java.util.function.Function;
 import java.util.stream.Collectors;
 
+import static com.thing.calculation.entity.table.CalcTargetConfigEntityTableDef.CALC_TARGET_CONFIG_ENTITY;
+
 /**
  * 物计算（目标物）配置
  *
@@ -70,14 +66,14 @@ public class CalcTargetConfigServiceImpl
     private final CalcSourceConfigService calcSourceConfigService;
 
     /** 变量池：A ~ Z */
-    private static final List<String> variablePool = new ArrayList<>();
-
-    static {
-        for (int asciiValue = 65; asciiValue <= 90; asciiValue++) {
-            char c = (char) asciiValue;
-            variablePool.add(String.valueOf(c));
-        }
-    }
+//    private static final List<String> variablePool = new ArrayList<>();
+//
+//    static {
+//        for (int asciiValue = 65; asciiValue <= 90; asciiValue++) {
+//            char c = (char) asciiValue;
+//            variablePool.add(String.valueOf(c));
+//        }
+//    }
 
 
     @Override
@@ -160,6 +156,32 @@ public class CalcTargetConfigServiceImpl
         calcSourceConfigService.saveOrUpdateBatch(sourceConfigEntities);
     }
 
+    // 递归生成字母组合
+    public static List<String> generateCombinations(int targetSize) {
+        List<String> combinations = new ArrayList<>();
+        int letterCount = 26; // 英文字母数量
+
+        // 生成字母组合
+        int i = 0;
+        while (combinations.size() < targetSize) {
+            combinations.add(toExcelColumn(i++));
+        }
+
+        return combinations;
+    }
+    // 将数字转换为类似Excel列的字母组合（从A到Z，AA，AB等）
+    public static String toExcelColumn(int n) {
+        StringBuilder sb = new StringBuilder();
+
+        // 转换为Excel列号
+        while (n >= 0) {
+            sb.append((char) ('A' + n % 26));
+            n = n / 26 - 1;
+        }
+
+        return sb.reverse().toString();
+    }
+
     /**
      * 生成配置默认信息，手动生成id以建立目标物和计算物之间的关联
      *
@@ -379,9 +401,12 @@ public class CalcTargetConfigServiceImpl
     private void autoGenerateFormula(
             CalcTargetConfigDTO targetConfig, List<CalcSourceConfigDTO> sourceConfigs) {
         StringBuilder formulaBuilder = new StringBuilder();
+
+        List<String> combinations = generateCombinations(CollectionUtil.size(sourceConfigs));
+
         for (int i = 0; i < sourceConfigs.size(); i++) {
             CalcSourceConfigDTO sourceConfig = sourceConfigs.get(i);
-            String alias = variablePool.get(i);
+            String alias = combinations.get(i);
             sourceConfig.setSourceAttrAlias(alias);
             formulaBuilder.append(alias);
             if (i < sourceConfigs.size() - 1) {
@@ -394,9 +419,10 @@ public class CalcTargetConfigServiceImpl
     private void autoGenerateFormula(
             CalcTargetConfigEntity targetConfig, List<CalcSourceConfigEntity> sourceConfigs) {
         StringBuilder formulaBuilder = new StringBuilder();
+        List<String> combinations = generateCombinations(CollectionUtil.size(sourceConfigs));
         for (int i = 0; i < sourceConfigs.size(); i++) {
             CalcSourceConfigEntity sourceConfig = sourceConfigs.get(i);
-            String alias = variablePool.get(i);
+            String alias = combinations.get(i);
             sourceConfig.setSourceAttrAlias(alias);
             formulaBuilder.append(alias);
             if (i < sourceConfigs.size() - 1) {