diff --git a/ruoyi-common/ruoyi-common-core/src/main/java/com/ruoyi/common/core/utils/poi/ExcelUtil.java b/ruoyi-common/ruoyi-common-core/src/main/java/com/ruoyi/common/core/utils/poi/ExcelUtil.java
index 8c243433..c2be4c63 100644
--- a/ruoyi-common/ruoyi-common-core/src/main/java/com/ruoyi/common/core/utils/poi/ExcelUtil.java
+++ b/ruoyi-common/ruoyi-common-core/src/main/java/com/ruoyi/common/core/utils/poi/ExcelUtil.java
@@ -1003,7 +1003,7 @@ public class ExcelUtil<T>
                 String separator = attr.separator();
                 if (StringUtils.isNotEmpty(dateFormat) && StringUtils.isNotNull(value))
                 {
-                    cell.getCellStyle().setDataFormat(this.wb.getCreationHelper().createDataFormat().getFormat(dateFormat));
+                    cell.setCellStyle(createCellStyle(cell.getCellStyle(), dateFormat));
                     cell.setCellValue(parseDateToStr(dateFormat, value));
                 }
                 else if (StringUtils.isNotEmpty(readConverterExp) && StringUtils.isNotNull(value))
@@ -1033,6 +1033,21 @@ public class ExcelUtil<T>
         return cell;
     }
 
+    /**
+     * 使用自定义格式，同时避免样式污染
+     * 
+     * @param cellStyle 从此样式复制
+     * @param format 格式匹配的字符串
+     * @return 格式化后CellStyle对象
+     */
+    private CellStyle createCellStyle(CellStyle cellStyle, String format)
+    {
+        CellStyle style = wb.createCellStyle();
+        style.cloneStyleFrom(cellStyle);
+        style.setDataFormat(wb.getCreationHelper().createDataFormat().getFormat(format));
+        return style;
+    }
+
     /**
      * 设置 POI XSSFSheet 单元格提示或选择框
      *