diff --git a/mybatis-flex-core/src/main/java/com/mybatisflex/core/relation/AbstractRelation.java b/mybatis-flex-core/src/main/java/com/mybatisflex/core/relation/AbstractRelation.java
index 0cbf77d5..4e20de1a 100644
--- a/mybatis-flex-core/src/main/java/com/mybatisflex/core/relation/AbstractRelation.java
+++ b/mybatis-flex-core/src/main/java/com/mybatisflex/core/relation/AbstractRelation.java
@@ -83,7 +83,7 @@ public abstract class AbstractRelation<SelfEntity> {
 
         this.dataSource = dataSource;
 
-        this.selfField = ClassUtil.getFirstField(entityClass, field -> field.getName().equals(selfField));
+        this.selfField = ClassUtil.getFirstField(entityClass, field -> field.getName().equalsIgnoreCase(selfField));
         this.selfFieldWrapper = FieldWrapper.of(entityClass, selfField);
 
         //以使用者注解配置为主
@@ -94,12 +94,13 @@ public abstract class AbstractRelation<SelfEntity> {
         //当指定了 valueField 的时候，一般是 String Integer 等基本数据类型
         this.targetEntityClass = (StringUtil.isNotBlank(valueField) && targetTableInfo != null) ? targetTableInfo.getEntityClass() : relationFieldWrapper.getMappingType();
 
-        this.targetField = ClassUtil.getFirstField(targetEntityClass, field -> field.getName().equals(targetField));
+        this.targetField = ClassUtil.getFirstField(targetEntityClass, field -> field.getName().equalsIgnoreCase(targetField));
         if (this.targetField == null) {
             throw new IllegalStateException("Can not find field by name \"" + targetField + "\" from class: " + targetEntityClass.getName());
         }
 
         this.targetFieldWrapper = FieldWrapper.of(targetEntityClass, targetField);
+
         this.valueField = valueField;
         this.onlyQueryValueField = StringUtil.isNotBlank(valueField);