diff --git a/src/main/java/com/rj/service/impl/LbDailyUserTradeServiceImpl.java b/src/main/java/com/rj/service/impl/LbDailyUserTradeServiceImpl.java
index aec0895..18eebdb 100644
--- a/src/main/java/com/rj/service/impl/LbDailyUserTradeServiceImpl.java
+++ b/src/main/java/com/rj/service/impl/LbDailyUserTradeServiceImpl.java
@@ -43,6 +43,8 @@ import java.util.List;
 import java.util.Map;
 import java.util.Set;
 import java.util.UUID;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.locks.ReentrantLock;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 
@@ -70,6 +72,8 @@ public class LbDailyUserTradeServiceImpl extends ServiceImpl<LbDailyUserTradeMap
     private static final int DB_PROMOTER_NAME_MAX = 100;
     private static final int DB_DESC_MAX = 512;
     private static final int ID_IN_QUERY_BATCH = 500;
+    /** 同一租户同时只允许一个 Excel 导入，避免并发请求或连点导致重复插入 */
+    private static final ConcurrentHashMap<String, ReentrantLock> TENANT_LB_DAILY_TRADE_IMPORT_LOCKS = new ConcurrentHashMap<>();
 
     @Autowired
     private ILbDailyUserTradeReportService lbDailyUserTradeReportService;
@@ -197,6 +201,13 @@ public class LbDailyUserTradeServiceImpl extends ServiceImpl<LbDailyUserTradeMap
             return result;
         }
 
+        ReentrantLock tenantImportLock = TENANT_LB_DAILY_TRADE_IMPORT_LOCKS.computeIfAbsent(
+                normalizedTenantId, k -> new ReentrantLock());
+        if (!tenantImportLock.tryLock()) {
+            result.put("success", false);
+            result.put("message", "该租户已有导入任务正在执行，请等待完成后再试，避免重复写入数据");
+            return result;
+        }
         String previousTenantId = TenantContextHolder.getTenantId();
         TenantContextHolder.setTenantId(normalizedTenantId);
         try {
@@ -223,6 +234,8 @@ public class LbDailyUserTradeServiceImpl extends ServiceImpl<LbDailyUserTradeMap
         List<LbDailyUserTrade> importList = new ArrayList<>();
         List<String> skippedRows = new ArrayList<>();
         int skippedHiddenRows = 0;
+        /** 表头以下：非空行且非隐藏行，即参与解析的 Excel 行数（含解析失败/跳过的行） */
+        int excelTableRowCount = 0;
         DataFormatter dataFormatter = new DataFormatter();
         log.info("开始导入Excel，fileName={}, size={} bytes, defaultReportDate={}",
                 originalFilename, file.getSize(), defaultReportDate);
@@ -247,12 +260,12 @@ public class LbDailyUserTradeServiceImpl extends ServiceImpl<LbDailyUserTradeMap
                 if (row == null || isEmptyRow(row, dataFormatter)) {
                     continue;
                 }
-                // 隐藏行（行高为 0）在部分导出/复制模板中会与可见行重复存一份数据；
-                // POI 仍会遍历到这些行，若不跳过会导致导入条数约为可见行的整数倍。
+                // 部分导出模板会把同一笔数据再存一份「行高为 0」的隐藏行；与业务是否重复无关，仅排除此类重复物理行。
                 if (row.getZeroHeight()) {
                     skippedHiddenRows++;
                     continue;
                 }
+                excelTableRowCount++;
                 try {
                     LbDailyUserTrade trade = parseTradeRow(row, headerIndexMap, dataFormatter, fallbackReportDate, normalizedTenantId);
                     if (trade == null) {
@@ -327,9 +340,12 @@ public class LbDailyUserTradeServiceImpl extends ServiceImpl<LbDailyUserTradeMap
             result.put("parsedCount", total);
             result.put("skipCount", skippedRows.size());
             result.put("skippedRows", skippedRows);
+            result.put("skippedHiddenRowCount", skippedHiddenRows);
             return result;
         }
 
+        int dbInsertedRowCount = importList.size();
+        log.info("lb_daily_user_trade 导入落库完成：Excel表格行数={}，插入数据库行数={}", excelTableRowCount, dbInsertedRowCount);
         log.info("导入成功，fileName={}, importCount={}, skipCount={}, skippedHiddenRows={}",
                 originalFilename, importList.size(), skippedRows.size(), skippedHiddenRows);
         result.put("success", true);
@@ -345,6 +361,7 @@ public class LbDailyUserTradeServiceImpl extends ServiceImpl<LbDailyUserTradeMap
             } else {
                 TenantContextHolder.clear();
             }
+            tenantImportLock.unlock();
         }
     }
 
@@ -516,13 +533,7 @@ public class LbDailyUserTradeServiceImpl extends ServiceImpl<LbDailyUserTradeMap
             return null;
         }
 
-        LbDailyUserTrade matchedTrade = null;
-        if (StringUtils.isBlank(userId) && StringUtils.isNotBlank(nickname)) {
-            matchedTrade = findLatestTradeByNickname(tenantId, nickname);
-            if (matchedTrade != null && StringUtils.isNotBlank(matchedTrade.getUserId())) {
-                userId = matchedTrade.getUserId();
-            }
-        }
+        // 严格按 Excel 行写入：不查库合并/补全 userId 或推广人；与库内是否重复无关，每行一条 INSERT。
         if (userId.isEmpty()) {
             userId = "AUTO_USERID_" + UUID.randomUUID().toString().replace("-", "");
         }
@@ -534,18 +545,8 @@ public class LbDailyUserTradeServiceImpl extends ServiceImpl<LbDailyUserTradeMap
         trade.setNickname(nickname);
         trade.setDailySellAmt(readDecimal(row, headerMap.get("dailySellAmt"), formatter));
         trade.setDailyBuyAmt(readDecimal(row, headerMap.get("dailyBuyAmt"), formatter));
-        String promoterId = readString(row, headerMap.get("promoterId"), formatter);
-        String promoterName = readString(row, headerMap.get("promoterName"), formatter);
-        if (matchedTrade != null) {
-            if (StringUtils.isBlank(promoterId) && StringUtils.isNotBlank(matchedTrade.getPromoterId())) {
-                promoterId = matchedTrade.getPromoterId();
-            }
-            if (StringUtils.isBlank(promoterName) && StringUtils.isNotBlank(matchedTrade.getPromoterName())) {
-                promoterName = matchedTrade.getPromoterName();
-            }
-        }
-        trade.setPromoterId(promoterId);
-        trade.setPromoterName(promoterName);
+        trade.setPromoterId(readString(row, headerMap.get("promoterId"), formatter));
+        trade.setPromoterName(readString(row, headerMap.get("promoterName"), formatter));
         trade.setDescContent(readString(row, headerMap.get("descContent"), formatter));
 
         BigDecimal sell = trade.getDailySellAmt() == null ? BigDecimal.ZERO : trade.getDailySellAmt();
@@ -562,15 +563,6 @@ public class LbDailyUserTradeServiceImpl extends ServiceImpl<LbDailyUserTradeMap
         return trade;
     }
 
-    private LbDailyUserTrade findLatestTradeByNickname(String tenantId, String nickname) {
-        LambdaQueryWrapper<LbDailyUserTrade> wrapper = new LambdaQueryWrapper<>();
-        wrapper.eq(LbDailyUserTrade::getTenantId, tenantId)
-                .eq(LbDailyUserTrade::getNickname, nickname.trim())
-                .orderByDesc(LbDailyUserTrade::getUpdatedAt)
-                .last("limit 1");
-        return this.getOne(wrapper, false);
-    }
-
     private boolean isEmptyRow(Row row, DataFormatter formatter) {
         if (row == null) {
             return true;