diff --git a/sa-admin/src/main/java/net/lab1024/sa/admin/module/business/caseplatformcase/controller/CaseplatformCaseExcelController.java b/sa-admin/src/main/java/net/lab1024/sa/admin/module/business/caseplatformcase/controller/CaseplatformCaseExcelController.java
index 9f4fff3..6d76652 100644
--- a/sa-admin/src/main/java/net/lab1024/sa/admin/module/business/caseplatformcase/controller/CaseplatformCaseExcelController.java
+++ b/sa-admin/src/main/java/net/lab1024/sa/admin/module/business/caseplatformcase/controller/CaseplatformCaseExcelController.java
@@ -18,6 +18,8 @@ import net.lab1024.sa.common.common.exception.BusinessException;
 import net.lab1024.sa.common.module.support.operatelog.annoation.OperateLog;
 import org.apache.poi.ss.formula.functions.T;
 import org.apache.poi.ss.usermodel.*;
+import org.apache.poi.ss.util.CellRangeAddress;
+import org.apache.poi.xssf.streaming.SXSSFSheet;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.security.access.prepost.PreAuthorize;
 import org.springframework.web.bind.annotation.*;
@@ -157,6 +159,101 @@ public class CaseplatformCaseExcelController {
             // 写数据
             writer.write(processedList, writeSheet);
 
+            // 创建合计行（在数据写入后，finish 之前）
+            try {
+                Workbook workbook = writer.writeContext().writeWorkbookHolder().getWorkbook();
+                Sheet sheet = workbook.getSheetAt(0);
+                int totalRowIndex = 2 + processedList.size(); // 0=大标题，1=表头，2~1+size=数据，2+size=合计
+                
+                Row totalRow = null;
+                // 如果是 SXSSFSheet，需要特殊处理
+                if (sheet instanceof SXSSFSheet) {
+                    SXSSFSheet sxssfSheet = (SXSSFSheet) sheet;
+                    // 先刷新所有已写入的行到磁盘
+                    sxssfSheet.flushRows();
+                    // 然后尝试创建新行
+                    try {
+                        totalRow = sxssfSheet.createRow(totalRowIndex);
+                    } catch (IllegalArgumentException e) {
+                        // 如果行已经存在，尝试获取它
+                        totalRow = sxssfSheet.getRow(totalRowIndex);
+                        if (totalRow == null) {
+                            // 如果获取失败，尝试使用随机访问窗口
+                            sxssfSheet.setRandomAccessWindowSize(-1); // 禁用随机访问窗口限制
+                            totalRow = sxssfSheet.createRow(totalRowIndex);
+                        }
+                    }
+                } else {
+                    // 普通 Sheet，直接创建或获取
+                    totalRow = sheet.getRow(totalRowIndex);
+                    if (totalRow == null) {
+                        totalRow = sheet.createRow(totalRowIndex);
+                    }
+                }
+                
+                if (totalRow == null) {
+                    throw new RuntimeException("无法创建合计行");
+                }
+                
+                totalRow.setHeightInPoints(22);
+
+                // 合计行样式（黑底白字）
+                CellStyle totalStyle = workbook.createCellStyle();
+                Font totalFont = workbook.createFont();
+                totalFont.setBold(true);
+                totalFont.setColor(IndexedColors.WHITE.getIndex());
+                totalStyle.setFont(totalFont);
+                totalStyle.setFillForegroundColor(IndexedColors.BLACK.getIndex());
+                totalStyle.setFillPattern(FillPatternType.SOLID_FOREGROUND);
+                totalStyle.setAlignment(HorizontalAlignment.CENTER);
+                totalStyle.setVerticalAlignment(VerticalAlignment.CENTER);
+                totalStyle.setBorderTop(BorderStyle.THIN);
+                totalStyle.setBorderBottom(BorderStyle.THIN);
+                totalStyle.setBorderLeft(BorderStyle.THIN);
+                totalStyle.setBorderRight(BorderStyle.THIN);
+
+                // 合并前6列写"合计"
+                sheet.addMergedRegion(new CellRangeAddress(totalRowIndex, totalRowIndex, 0, 5));
+                Cell totalCell = totalRow.createCell(0);
+                totalCell.setCellValue("合计");
+                totalCell.setCellStyle(totalStyle);
+
+                // 实发、个税、应发赋值+样式
+                Cell actualCell = totalRow.createCell(6);
+                actualCell.setCellValue(totalActual);
+                actualCell.setCellStyle(totalStyle);
+
+                Cell taxCell = totalRow.createCell(8);
+                taxCell.setCellValue(totalTax);
+                taxCell.setCellStyle(totalStyle);
+
+                Cell totalAmtCell = totalRow.createCell(9);
+                totalAmtCell.setCellValue(totalTotal);
+                totalAmtCell.setCellStyle(totalStyle);
+
+                // 其他列补充边框
+                CellStyle borderStyle = workbook.createCellStyle();
+                borderStyle.setBorderBottom(BorderStyle.THIN);
+                borderStyle.setBorderTop(BorderStyle.THIN);
+                borderStyle.setBorderLeft(BorderStyle.THIN);
+                borderStyle.setBorderRight(BorderStyle.THIN);
+                borderStyle.setAlignment(HorizontalAlignment.CENTER);
+
+                for (int i = 0; i < head.size(); i++) {
+                    if (i == 0 || i == 6 || i == 8 || i == 9) {
+                        continue;
+                    }
+                    Cell cell = totalRow.getCell(i);
+                    if (cell == null) {
+                        cell = totalRow.createCell(i);
+                    }
+                    cell.setCellStyle(borderStyle);
+                }
+            } catch (Exception e) {
+                // 如果创建合计行失败，记录错误但不影响导出
+                e.printStackTrace();
+            }
+
             // 6通知浏览器以附件的形式下载处理，设置返回头要注意文件名有中文
             String fileName = URLEncoder.encode("病例数据", "UTF-8").replaceAll("\\+", "%20");
             response.setHeader("Content-disposition", "attachment;filename=" + fileName + ".xlsx");