diff --git a/src/main/java/com/gaotao/modules/labelSplitMerge/service/impl/LabelSplitMergeServiceImpl.java b/src/main/java/com/gaotao/modules/labelSplitMerge/service/impl/LabelSplitMergeServiceImpl.java
index 7868c8b..a4a9a87 100644
--- a/src/main/java/com/gaotao/modules/labelSplitMerge/service/impl/LabelSplitMergeServiceImpl.java
+++ b/src/main/java/com/gaotao/modules/labelSplitMerge/service/impl/LabelSplitMergeServiceImpl.java
@@ -88,19 +88,19 @@ public class LabelSplitMergeServiceImpl extends ServiceImpl<LabelSplitMergeMappe
             if (currentStock == null) {
                 throw new RuntimeException("未找到原标签库存信息");
             }
-            Float originalQuantity = Float.parseFloat(currentStock.get("qtyOnHand").toString());
+            BigDecimal originalQuantity = parseQuantity(currentStock.get("qtyOnHand"), "原标签库存数量");
 
             // 获取拆分张数，默认为1（兼容旧版本）
             Integer splitCount = params.get("splitCount") != null ? Integer.parseInt(params.get("splitCount").toString()) : 1;
-            Float splitQuantity = Float.parseFloat(params.get("splitQuantity").toString());
+            BigDecimal splitQuantity = parseQuantity(params.get("splitQuantity"), "拆分数量");
             // 总拆分数量 = 拆分张数 * 每张数量
-            Float totalSplitQuantity = splitCount * splitQuantity;
-            Float remainingQuantity = originalQuantity - totalSplitQuantity;
+            BigDecimal totalSplitQuantity = splitQuantity.multiply(BigDecimal.valueOf(splitCount));
+            BigDecimal remainingQuantity = originalQuantity.subtract(totalSplitQuantity);
 
             if (splitCount <= 0) {
                 throw new RuntimeException("拆分张数必须大于0");
             }
-            if (splitQuantity <= 0 || totalSplitQuantity >= originalQuantity) {
+            if (splitQuantity.compareTo(BigDecimal.ZERO) <= 0 || totalSplitQuantity.compareTo(originalQuantity) >= 0) {
                 throw new RuntimeException("拆分总数量必须大于0且小于原数量");
             }
 
@@ -151,9 +151,9 @@ public class LabelSplitMergeServiceImpl extends ServiceImpl<LabelSplitMergeMappe
                 insertParams.put("latestInDate", new Date());
                 insertParams.put("activeDate", new Date());
                 insertParams.put("inQty", splitQuantity);
-                insertParams.put("outQty", 0.0f);
+                insertParams.put("outQty", BigDecimal.ZERO);
                 insertParams.put("qtyOnHand", splitQuantity);
-                insertParams.put("qtyReserved", 0.0f);
+                insertParams.put("qtyReserved", BigDecimal.ZERO);
                 insertParams.put("freezeFlag", params.get("freezeFlag"));
                 insertParams.put("manufactureDate", params.get("manufactureDate"));
                 insertParams.put("expiredDate", params.get("expiredDate"));
@@ -232,9 +232,9 @@ public class LabelSplitMergeServiceImpl extends ServiceImpl<LabelSplitMergeMappe
             String status = (String) params.get("status");
             String statusTb = (String) params.get("statusTb");
 
-            Float targetQuantity = Float.parseFloat(params.get("targetQuantity").toString());
-            Float sourceQuantity = Float.parseFloat(params.get("sourceQuantity").toString());
-            Float mergedQuantity = targetQuantity + sourceQuantity;
+            BigDecimal targetQuantity = parseQuantity(params.get("targetQuantity"), "目标标签数量");
+            BigDecimal sourceQuantity = parseQuantity(params.get("sourceQuantity"), "源标签数量");
+            BigDecimal mergedQuantity = targetQuantity.add(sourceQuantity);
 
             // 1. 更新源标签的库存数量（增加合并后的总数量）
             Map<String, Object> updateSourceParams = new HashMap<>();
@@ -298,8 +298,8 @@ public class LabelSplitMergeServiceImpl extends ServiceImpl<LabelSplitMergeMappe
     /**
      * 生成标签拆分事务记录
      */
-    private void generateSplitTransaction(String site, String buNo, String warehouseId, String originalLabelCode, 
-                                        String newLabelCode, String partNo, String batchNo, Float splitQuantity, Float remainingQuantity, String locationCode) {
+    private void generateSplitTransaction(String site, String buNo, String warehouseId, String originalLabelCode,
+                                        String newLabelCode, String partNo, String batchNo, BigDecimal splitQuantity, BigDecimal remainingQuantity, String locationCode) {
         logger.info("开始生成标签拆分事务记录，原标签: {}, 新标签: {}", originalLabelCode, newLabelCode);
 
         try {
@@ -336,8 +336,8 @@ public class LabelSplitMergeServiceImpl extends ServiceImpl<LabelSplitMergeMappe
     /**
      * 生成标签合并事务记录
      */
-    private void generateMergeTransaction(String site, String buNo, String warehouseId, String sourceLabelCode, 
-                                        String targetLabelCode, String partNo, String batchNo, Float sourceQuantity, Float targetQuantity, Float mergedQuantity, String locationCode) {
+    private void generateMergeTransaction(String site, String buNo, String warehouseId, String sourceLabelCode,
+                                        String targetLabelCode, String partNo, String batchNo, BigDecimal sourceQuantity, BigDecimal targetQuantity, BigDecimal mergedQuantity, String locationCode) {
         logger.info("开始生成标签合并事务记录，源标签: {}, 目标标签: {}", sourceLabelCode, targetLabelCode);
 
         try {
@@ -374,7 +374,7 @@ public class LabelSplitMergeServiceImpl extends ServiceImpl<LabelSplitMergeMappe
      * 生成标签拆分事务明细记录
      */
     private void generateSplitTransactionDetails(String transNo, String originalLabelCode, String newLabelCode,
-                                               String partNo, String batchNo, Float splitQuantity, Float remainingQuantity, String site, String buNo) {
+                                               String partNo, String batchNo, BigDecimal splitQuantity, BigDecimal remainingQuantity, String site, String buNo) {
         logger.info("开始生成标签拆分事务明细记录，事务单号: {}", transNo);
         List<TransDetail> transDetailList = new ArrayList<>();
 
@@ -384,7 +384,7 @@ public class LabelSplitMergeServiceImpl extends ServiceImpl<LabelSplitMergeMappe
         originalDetail.setTransno(transNo);
         originalDetail.setItemno(1.0);
         originalDetail.setPartno(partNo);
-        originalDetail.setTransqty(new BigDecimal(splitQuantity.toString()));
+        originalDetail.setTransqty(splitQuantity);
         originalDetail.setBatchno(batchNo);
         originalDetail.setDirection("-"); // 减少方向
         originalDetail.setOrderref1(originalLabelCode); // 原标签条码
@@ -399,7 +399,7 @@ public class LabelSplitMergeServiceImpl extends ServiceImpl<LabelSplitMergeMappe
         newDetail.setTransno(transNo);
         newDetail.setItemno(2.0);
         newDetail.setPartno(partNo);
-        newDetail.setTransqty(new BigDecimal(splitQuantity.toString()));
+        newDetail.setTransqty(splitQuantity);
         newDetail.setBatchno(batchNo);
         newDetail.setDirection("+"); // 增加方向
         newDetail.setOrderref1(newLabelCode); // 新标签条码
@@ -419,8 +419,8 @@ public class LabelSplitMergeServiceImpl extends ServiceImpl<LabelSplitMergeMappe
     /**
      * 添加子明细数据
      */
-    private void addSubTransactionDetails(String transNo, String originalLabelCode, String newLabelCode, String batchNo, Float splitQuantity,
-                                          Float remainingQuantity, String site, String buNo, String warehouseId, String locationCode) {
+    private void addSubTransactionDetails(String transNo, String originalLabelCode, String newLabelCode, String batchNo, BigDecimal splitQuantity,
+                                          BigDecimal remainingQuantity, String site, String buNo, String warehouseId, String locationCode) {
         logger.info("开始添加子明细数据，事务单号: {}", transNo);
         List<TransDetailSub> subDetailList = new ArrayList<>();
 
@@ -429,7 +429,7 @@ public class LabelSplitMergeServiceImpl extends ServiceImpl<LabelSplitMergeMappe
         originalSubDetail.setTransNo(transNo);
         originalSubDetail.setItemNo(1.0);
         originalSubDetail.setSubNo(originalLabelCode);
-        originalSubDetail.setSubQty(Double.valueOf(splitQuantity));
+        originalSubDetail.setSubQty(splitQuantity.doubleValue());
         originalSubDetail.setDirection("-");
         originalSubDetail.setOrderRef2(buNo);
         originalSubDetail.setOrderRef3(batchNo);
@@ -442,7 +442,7 @@ public class LabelSplitMergeServiceImpl extends ServiceImpl<LabelSplitMergeMappe
         newSubDetail.setTransNo(transNo);
         newSubDetail.setItemNo(2.0);
         newSubDetail.setSubNo(newLabelCode);
-        newSubDetail.setSubQty(Double.valueOf(splitQuantity));
+        newSubDetail.setSubQty(splitQuantity.doubleValue());
         newSubDetail.setDirection("+");
         newSubDetail.setOrderRef2(buNo);
         newSubDetail.setOrderRef3(batchNo);
@@ -460,8 +460,8 @@ public class LabelSplitMergeServiceImpl extends ServiceImpl<LabelSplitMergeMappe
     /**
      * 生成标签合并事务明细记录
      */
-    private void generateMergeTransactionDetails(String transNo, String sourceLabelCode, String targetLabelCode, 
-                                               String partNo, String batchNo, Float sourceQuantity, Float targetQuantity, Float mergedQuantity, String site, String buNo) {
+    private void generateMergeTransactionDetails(String transNo, String sourceLabelCode, String targetLabelCode,
+                                               String partNo, String batchNo, BigDecimal sourceQuantity, BigDecimal targetQuantity, BigDecimal mergedQuantity, String site, String buNo) {
         logger.info("开始生成标签合并事务明细记录，事务单号: {}", transNo);
 
         List<TransDetail> transDetailList = new ArrayList<>();
@@ -472,7 +472,7 @@ public class LabelSplitMergeServiceImpl extends ServiceImpl<LabelSplitMergeMappe
         targetDetail.setTransno(transNo);
         targetDetail.setItemno(1.0);
         targetDetail.setPartno(partNo);
-        targetDetail.setTransqty(new BigDecimal(targetQuantity.toString()));
+        targetDetail.setTransqty(targetQuantity);
         targetDetail.setBatchno(batchNo);
         targetDetail.setDirection("-"); // 减少方向
         targetDetail.setOrderref1(targetLabelCode); // 目标标签条码
@@ -487,7 +487,7 @@ public class LabelSplitMergeServiceImpl extends ServiceImpl<LabelSplitMergeMappe
         sourceDetail.setTransno(transNo);
         sourceDetail.setItemno(2.0);
         sourceDetail.setPartno(partNo);
-        sourceDetail.setTransqty(new BigDecimal(mergedQuantity.toString()));
+        sourceDetail.setTransqty(mergedQuantity);
         sourceDetail.setBatchno(batchNo);
         sourceDetail.setDirection("+"); // 增加方向
         sourceDetail.setOrderref1(sourceLabelCode); // 源标签条码
@@ -506,8 +506,8 @@ public class LabelSplitMergeServiceImpl extends ServiceImpl<LabelSplitMergeMappe
     /**
      * 添加子明细数据
      */
-    private void addSubTransactionDetails2(String transNo, String sourceLabelCode, String targetLabelCode, String batchNo, Float sourceQuantity,
-                                           Float targetQuantity, Float mergedQuantity, String site, String buNo, String warehouseId, String locationCode) {
+    private void addSubTransactionDetails2(String transNo, String sourceLabelCode, String targetLabelCode, String batchNo, BigDecimal sourceQuantity,
+                                           BigDecimal targetQuantity, BigDecimal mergedQuantity, String site, String buNo, String warehouseId, String locationCode) {
         logger.info("开始添加子明细数据，事务单号: {}", transNo);
         List<TransDetailSub> subDetailList = new ArrayList<>();
 
@@ -516,7 +516,7 @@ public class LabelSplitMergeServiceImpl extends ServiceImpl<LabelSplitMergeMappe
         originalSubDetail.setTransNo(transNo);
         originalSubDetail.setItemNo(1.0);
         originalSubDetail.setSubNo(sourceLabelCode);
-        originalSubDetail.setSubQty(Double.valueOf(targetQuantity));
+        originalSubDetail.setSubQty(targetQuantity.doubleValue());
         originalSubDetail.setDirection("-");
         originalSubDetail.setOrderRef2(buNo);
         originalSubDetail.setOrderRef3(batchNo);
@@ -529,7 +529,7 @@ public class LabelSplitMergeServiceImpl extends ServiceImpl<LabelSplitMergeMappe
         newSubDetail.setTransNo(transNo);
         newSubDetail.setItemNo(2.0);
         newSubDetail.setSubNo(targetLabelCode);
-        newSubDetail.setSubQty(Double.valueOf(mergedQuantity));
+        newSubDetail.setSubQty(mergedQuantity.doubleValue());
         newSubDetail.setDirection("+");
         newSubDetail.setOrderRef2(buNo);
         newSubDetail.setOrderRef3(batchNo);
@@ -543,4 +543,18 @@ public class LabelSplitMergeServiceImpl extends ServiceImpl<LabelSplitMergeMappe
         }
         logger.info("子明细记录生成成功，共生成 {} 条子明细记录", subDetailList.size());
     }
+
+    /**
+     * 统一数量解析，避免浮点精度误差
+     */
+    private BigDecimal parseQuantity(Object value, String fieldName) {
+        if (value == null) {
+            throw new RuntimeException(fieldName + "不能为空");
+        }
+        try {
+            return new BigDecimal(value.toString().trim());
+        } catch (NumberFormatException e) {
+            throw new RuntimeException(fieldName + "格式不正确: " + value);
+        }
+    }
 }