The random charging of electric vehicles will lead to the sudden change of peak load,increasing the risk of power grid operation fluctuation.Therefore,a coordinated charging scheduling of electric vehicles ba sed on microgrids is proposed in this paper.The example shows that the strategy can reduce the peak value of load and weaken the risk of random uncertain charging for power grid fluctuation.Firstly,the charging emergency index is considered to reflect different charging requirements,and the randomness of the charging time behavior of the electric vehicle is simulated further to ensure the coordinated charging of the electric vehicle.Secondly,an optimization model of coordinated charging scheduling is established to minimize the overall peak-valley load difference,considering the slow and fast charging of electric steam and various limitations of microgrid operation.Finally,the simulation results show that the method can effectively solve the charging selection mode of electric vehicle owners and reduce the risk of microgrid operation,so that the flexible load can be effectively transferred,and the strategy for peak load shifting of microgrid is provided.