diff --git a/src/data/api/Api3dRepository.cpp b/src/data/api/Api3dRepository.cpp
index c8a390b..79e8400 100644
--- a/src/data/api/Api3dRepository.cpp
+++ b/src/data/api/Api3dRepository.cpp
@@ -354,6 +354,18 @@ void Api3dRepository::createSlice(const SliceSpec& spec, const std::string& name
     slices_[id] = StoredSlice{
         spec, name,
         QDateTime::currentDateTime().toString(QStringLiteral("yyyy-MM-dd HH:mm")).toStdString()};
+    // 打印切片登记请求体（对齐 SliceGenerateRequest，端点 POST /business/dsObject/slice/generate）供后端联调。
+    //   projectId 由真实请求层据当前项目填充（mock 仓储无项目上下文，此处留空）。
+    SliceGenerateRequest req;
+    req.volumeDsId = spec.volumeDsId;
+    req.name = name;
+    req.axis = spec.axis;
+    req.origin = spec.origin;
+    req.point1 = spec.point1;
+    req.point2 = spec.point2;
+    req.colorScaleId = spec.colorScaleId;
+    qInfo().noquote() << "[slicereq] registerSlice 请求体:"
+                      << QJsonDocument(req.toJson()).toJson(QJsonDocument::Compact);
     onOk(id);
 }