diff --git a/hy3dshape/tools/evaluation/is_watertight.py b/hy3dshape/tools/evaluation/is_watertight.py
new file mode 100644
index 0000000..3508bc1
--- /dev/null
+++ b/hy3dshape/tools/evaluation/is_watertight.py
@@ -0,0 +1,13 @@
+import igl # pip install libigl
+import numpy as np
+import trimesh
+
+mesh_file = 'your_mesh.glb'
+mesh = trimesh.load(mesh_file, force='mesh', process=False)
+F = np.asarray(mesh.faces)
+bnd_loops = igl.boundary_loop(F)
+
+if len(bnd_loops) == 0 and igl.is_edge_manifold(F) and igl.is_vertex_manifold(F).all():
+    print("判断网格是水密的封闭流形")
+else:
+    print("非水密网格")