diff --git a/mhd_wms/src/main/java/com/mhd/wms/interfaces/dto/receiptMaterialDetail/LongFromStringDeserializer.java b/mhd_wms/src/main/java/com/mhd/wms/interfaces/dto/receiptMaterialDetail/LongFromStringDeserializer.java
new file mode 100644
index 000000000..ca7ef7a5e
--- /dev/null
+++ b/mhd_wms/src/main/java/com/mhd/wms/interfaces/dto/receiptMaterialDetail/LongFromStringDeserializer.java
@@ -0,0 +1,31 @@
+package com.mhd.wms.interfaces.dto.receiptMaterialDetail;
+
+import com.fasterxml.jackson.core.JsonParser;
+import com.fasterxml.jackson.databind.DeserializationContext;
+import com.fasterxml.jackson.databind.JsonDeserializer;
+import com.fasterxml.jackson.databind.JsonNode;
+
+import java.io.IOException;
+
+/**
+ * Long 反序列化器：支持从字符串或数字解析，避免 JavaScript 大整数精度丢失。
+ * 前端应始终以字符串形式传递 uniqueId、parentUniqueId、inUniqueId 等大 Long 字段。
+ */
+public class LongFromStringDeserializer extends JsonDeserializer<Long> {
+
+    @Override
+    public Long deserialize(JsonParser p, DeserializationContext ctxt) throws IOException {
+        JsonNode node = p.readValueAsTree();
+        if (node == null || node.isNull()) {
+            return null;
+        }
+        if (node.isTextual()) {
+            String s = node.asText();
+            return s == null || s.isEmpty() ? null : Long.parseLong(s.trim());
+        }
+        if (node.isNumber()) {
+            return node.asLong();
+        }
+        return null;
+    }
+}