Abstract: The policy and the development of plug-in electric vehicles（PEVs） in China are analyzed first.Then the charging modes and charging time of different kinds of PEVs’ charging behaviors in China are proposed according to the field survey.The charging periods of different kinds of PEVs’ charging behaviors are divided.The Monte Carlo simulation method is applied to determine the starting state of charge（SOC） and the initial charging point.With the charging methods（either on slow,regular,or fast mode） and initial charging point,together with the sampled starting SOC and charging needs of different PEVs’ charging behaviors,the charging time can be calculated to get the charging curve.Based on the study,the future charging load in China is forecasted.The results indicate that the charging of PEVs will have significant impacts on the planning and operation of the power system.The huge difference between charging peak and off-peak provides a substantial potential to coordinate the charging of PEVs.