With the transfer of China"s focus to the clean industry, China"s electric vehicles industry will enter a period of rapid development, a large number of electric vehicles charging behavior will have a greater impact on the grid. Load is an important indicator of the level of electricity consumption in residential areas. At present, there is little investigation and research on the load in residential areas. It is of great significance to understand and master the load about residential areas. It is important for power distribution design and power grid maintenance. In this paper, the situation of automobile charging is analyzed, and a series of typical residential areas are selected by feature extraction. The load of residential areas before and after electric vehicle access is calculated and analyzed. It has an important guiding role in power distribution design.