diff --git a/yudao-framework/yudao-spring-boot-starter-excel/src/main/java/cn/iocoder/yudao/framework/excel/core/util/ExcelUtils.java b/yudao-framework/yudao-spring-boot-starter-excel/src/main/java/cn/iocoder/yudao/framework/excel/core/util/ExcelUtils.java
index 1bdeabc50..c2104693e 100644
--- a/yudao-framework/yudao-spring-boot-starter-excel/src/main/java/cn/iocoder/yudao/framework/excel/core/util/ExcelUtils.java
+++ b/yudao-framework/yudao-spring-boot-starter-excel/src/main/java/cn/iocoder/yudao/framework/excel/core/util/ExcelUtils.java
@@ -1,12 +1,14 @@
 package cn.iocoder.yudao.framework.excel.core.util;
 
 import com.alibaba.excel.EasyExcel;
+import com.alibaba.excel.converters.longconverter.LongStringConverter;
 import com.alibaba.excel.write.style.column.LongestMatchColumnWidthStyleStrategy;
 import org.springframework.web.multipart.MultipartFile;
 
 import jakarta.servlet.http.HttpServletResponse;
 import java.io.IOException;
 import java.net.URLEncoder;
+import java.nio.charset.StandardCharsets;
 import java.util.List;
 
 /**
@@ -33,9 +35,10 @@ public class ExcelUtils {
         EasyExcel.write(response.getOutputStream(), head)
                 .autoCloseStream(false) // 不要自动关闭，交给 Servlet 自己处理
                 .registerWriteHandler(new LongestMatchColumnWidthStyleStrategy()) // 基于 column 长度，自动适配。最大 255 宽度
+                .registerConverter(new LongStringConverter()) // 避免 Long 类型丢失精度
                 .sheet(sheetName).doWrite(data);
         // 设置 header 和 contentType。写在最后的原因是，避免报错时，响应 contentType 已经被修改了
-        response.addHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode(filename, "UTF-8"));
+        response.addHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode(filename, StandardCharsets.UTF_8));
         response.setContentType("application/vnd.ms-excel;charset=UTF-8");
     }