This paper forecasts the demand for electric vehicles in East China from 2020-2040. First, the number of electric vehicles in East China is estimated, and then the average electricity consumption and fuel consumption calculation methods are used to predict their electricity consumption. The consumption caused by the rising demand for electric vehicles is predicted. The results show that the number of electric vehicles in East China will show rapid growth from 2020 to 2030, with an average annual growth rate of 79.11%, reaching 37.2 million by 2040. The electricity demand caused by electric vehicles will be 7, 132 and 198 TW·h in 2020, 2030 and 2040, respectively, and the average annual growth rate will drop from 24.6% to 4.11%. The average annual growth rate from 2020 to 2040 exceeds 18%. In 2040, the average annual growth rate of electric load for electric vehicles will be 2.27%, with a minimum load of 41 859 MW and a maximum load of 93 021 MW. This work is supported by the Shanghai Philosophy and Social Science Plan Common Project (No. 2019BJL011).