Abstract: The paper carries out further researches about the algorithm of reconstructing and simplifying the surface model of three-dimensional costume, and adopts the Discrete Marching Cubes （DiscMc）algorithm to apply the discrete idea to simplifying the triangle interface, thus the interpolating value which is time-consuming is reduced to the lowest so that the rebuilding efficiency and effect of the former system are greatly improved. The triangle interfaces in the same plane and in the neighbour are incorporated, It gets an excellent ratio of simplification, high efficiency of the algorithm, keeps a restricted loss of precision and the microstructure of surface model of costumes without being destroyed in the simplifying process of DiscMC. It is very obvious that the DiscMC is advantageous over other simplifying algorithms. In addition, it is seen from the descriptive experiment about the algorithm that the DiscMC is only confined to the point whose density of raw data is on the grid and simplifying is conducted only one time rather than repeatedly, therefore, it is very suitable for simplifying the 3-D surface model of costumes.