It is very important to utilize space distribution characteristics to obtain a number of minimum break point sets（MBPS）quickly.This paper elaborates the definition and the cause of formation of MBPS's space discrete characteristics，symmetry characteristics and clustering characteristics.An optimization method which contains both the space distribution characteristics and the binary particle swarm optimization is proposed for MBPS computation.The method realizes parallel computation of the whole power grids MBPS and solves the dimension disaster problem effectively.The search space of particles is narrowed，which improves the convergence speed of the optimization algorithm.At the same time，it is easy to obtain many minimum break point sets whose positions have big difference.Finally，taking the500kV line network of a provincial grid as an example，the results show that the proposed method is correct and valid.