Explosion-proof circular electric connector

The utility model discloses an explosion-proof circular electric connector which comprises a plug, the plug is plugged on a socket, a hole insulator is clamped in a plug shell through a hole insulator cover plate, a jack contact piece is plugged in the hole insulator, one side of a cable cover is connected to the rear end of the plug shell, and the other side of the cable cover is connected with a stainless steel rear cover plate. Mounting holes are formed in the center of the rear cover plate and the center of the hole insulator, a rotatable stainless steel connecting rod is inserted into the mounting holes, a locking handle is arranged at the end, outside the rear cover plate, of the connecting rod, a locking screw hole is formed in the other end of the connecting rod, and the pin insulator is clamped in the socket shell through the pin insulator cover plate. The pin insulator is inserted with a pin which is inserted with the jack contact element, the center position of the pin insulator is provided with a