A mesh model repairing algorithm based on vector field distance function is presented.It is fit for all kinds of polygonal mesh.As a volumetric repair method，it is very robust.For every flawed input mesh model，it can output an error-free and closed triangular mesh with coherent orientations.In the algorithm，the transformed volumetric model is represented by vector field distance function instead of scalar field distance function，it can keep much more features of the original mesh than the traditional scalar field distance function.In addition，when contouring output surface，the interpolation algorithm in the traditional MC method is improved to adapt it to new vector field distance function.Proved by theory and practice，the calculated interpolation position is much closer to the actual position of the mesh model and 3D grids.The extracted triangular mesh is 16.8% more accurate than traditional method.