Connecting plug and connecting socket

The utility model provides an attachment plug comprising a plastic plug body. The front end of the plastic plug body has a plug jacket, and a positioning through hole is arranged in the center of the jacket. The utility model also provides a gang socket comprising a plastic socket body. The front end of the socket body is equipped with a socket that cooperates with the plug jacket, and a positioning plate is arranged in the center of the gang socket and cooperates with the positioning through hole. The utility model uses the positioning plate to cooperate with the positioning through hole so as to achieve a more reliable contact and positioning of the attachment plug and the gang socket. The positioning plate completely separates the cathode connection and the anodic connection between the attachment plug and the gang socket to achieve higher safety and benefit the reduced size of the attachment plug and the gang socket.