This paper firstly obtains 100 sets of parameters related to the behavioral characteristics of electric vehicles through investigation, and then analyzes and processes them with the idea of summarization. Then, it draws the distribution pattern of each behavioral characteristic quantity of electric vehicles. Using SPSS mathematical software, the average charging power of 100 electric vehicles is read every day in a week. Using the concept of standard error to obtain the mean value of the population, we can generalize the conclusions in this paper.