For the impact of large scale electric vehicles connected to the micro grid, in parallel operation mode,the comprehensive optimization of operation cost of micro grid,environmental management cost and charging and discharging cost of electric vehicle user is selected as the objective function,considering the timespace distribution characteristics of electric vehicles, a scheduling scheme for orderly charging and discharging of electric vehicles under timesharing electricity price is proposed. A multiobjective economic scheduling model for micro grid system including wind, light, storage, fuel cell, micro gas turbine, electric vehicle and load was established, multiobjective firefly algorithm was used to solve the scheduling model and compared with multiobjective particle swarm optimization algorithm.Based on the MATLAB platform, a typical micro grid system is taken as an example for simulation,the scheduling period is one day,the results of an example verify the validity of the proposed scheme, model and algorithm.