diff --git a/src/app/main.cpp b/src/app/main.cpp
index 2d316a4..8b71a02 100644
--- a/src/app/main.cpp
+++ b/src/app/main.cpp
@@ -500,14 +500,17 @@ void buildWorkbench(QMainWindow& window, geopro::data::LocalSampleRepository& re
                 const ri::Vec3 e2{{p2[0] - o[0], p2[1] - o[1], p2[2] - o[2]}};
                 const ri::Vec3 normal = ri::normalize(ri::cross(e1, e2));
                 const std::string volId = sceneView->currentVolumeDsId();
+                // 异常归属（spec §8）：当前选中切片已保存（selectedSliceDsId 非空）→挂该切片；临时切片→挂体。
+                const std::string savedSliceId = interactionMgr->selectedSliceDsId();
                 anomalyDrawTool->start(
                     o, normal,
                     [&window, sceneView, scene3dRepo, renderWindowPtr, refreshAnomalies, volId,
-                     normal, o](const std::vector<ri::Vec3>& worldPts) {
+                     savedSliceId, normal, o](const std::vector<ri::Vec3>& worldPts) {
                         // 草稿异常：先临时渲染（让用户在对话框前看到所画，且截图含异常）。
                         geopro::core::Anomaly a;
                         a.markType = geopro::core::AnomalyMarkType::Polygon;
-                        a.remarkSourceId = volId;  // Step1 暂挂体；Step3 按所在切片是否已保存改 resolveAnomalyMount
+                        a.remarkSourceId =
+                            geopro::core::resolveAnomalyMount(!savedSliceId.empty(), savedSliceId, volId);
                         a.lineColor = "#ff3030";
                         a.lineWidth = 2.0;
                         a.dashed = false;