Abstract: The access of electric vehicles brings new requirement for the smart grid scheduling.The controlled charging strategy will make electric vehicles（EVs） play an important role in the peak load shifting in smart grid.The EVs charging load profile and the impacts of charging are studied firstly in this paper,and load model of EVs charging is then built.Based on the comprehensive analysis of the EV users’ requirements,the stochastic dispatching optimal power flow model of power grid by considering of the uncertainty of EVs charging is built.In the end,with the 33-bus test system as example,the load curve of power grid obtained by free mode and controlled charging dispatch model are compared,which verifies the feasibility and effectiveness of the developed stochastic dispatched EVs charging model.