Rational planning of charging stations for electric vehicles（EVs）lays great store upon the development of EVs.A multi-objective model is proposed which provides extra options for locating and sizing of EV charging stations.The optimization goal of the proposed model is to minimize the economic costs of charging station construction and operation，to shorten the time needed for charging EVs and to reduce the carbon emission caused by driving to a charging station.The capacity limit of the charging station is taken as the constraint，and Pareto front is used to compare and estimate the practical value of the current substation locating and sizing plans.A calculation method based on rasterization and Voronoi diagram is proposed to make it clear where the jurisdiction of each charging station ends.Finally，the proposed model and calculation method are verified using a case study.