Plug-and-socket device of charging connector

The utility model relates to a device for charging control and charging protection of an electric automobile, especially to a plug-and-socket device of a charging connector. The plug-and-socket device of the charging connector includes a charging plug and a socket; the socket is provided with two charging electrode pins and at least two weak electrode pins; the weak electrode pin is shorter than the charging electrode pin; the plug is provided with two corresponding charging electrode jacks and two corresponding weak electrode jacks; and two weak electrode jacks are conductive. In the utility model, two weak electrode pins shorter than the charging electrode pins are arranged on the socket; the plug connects with two weak electrode pins when it is plugged in the socket, thereby sending a signal to show a good connection state, and providing a signal support for a subsequent intelligent control system. The utility model has advantages of simple structure, convenient operation, safety and reliability, eliminates unsafe factors and plays a protection function.