The invention discloses a charging load model establishment and node voltage calculation method of an electric vehicle. The method comprises: S1, establishing a load charging model of an electric vehicle; S2, establishing a dynamic load model of a power distribution system; S3, giving access points of all load charging models in the power distribution system; and S4, analyzing the impact of electric vehicle charging on the power distribution system. According to the invention, three kinds of charging load models are established, so that the result is suitable for the actual circumstance and become reliable. And on the basis of calculation of the distribution probability characteristics of node voltages of the three models, the following conclusions are made: firstly, conventional chargingmode has the greatest influence on the operational stability of the distribution network; secondly, with the quick charging mode, the peak-to-valley difference of the load is increased substantially,so that economical operation of the grid is affected greatly; and thirdly, with increasing of the proportion of replacing the battery charging mode, the peak-to-valley difference of the load is reduced and the economical efficiency of the grid operation is increased, and the stability of distribution network operation of the power system is enhanced. Therefore, the charging load model establishment and node voltage calculation method has the great significance in research and development of charging vehicles in the field.