With the continuous development of new power systems

electric vehicles(EVs) develope rapidly.However

the impact of large-scale EVs on the reliability and security of the grid become increasingly prominent.EV charging load modeling is the basis for studying the impact of EVs on the distribution network and the subsequent regulation strategies.The traditional electrical characteristics mode-ling of electric loads can no longer represent the randomness of EV charging loads

and the uncertainty of its spatiotemporal distribution brings new difficulties to EV modeling.Therefore

it firstly analyzes the factors that affect EV charging load.Secondly

it reviews the randomness modeling methods of EV charging load from the three aspects of time dimension

space dimension and time and space dimension respectively.Finally

it analyzes the shortcomings of the existing research methods

and the conclusion and prospect.