A plurality of plug reeds are evenly distributed on the circumference of the inner wall of a head shell, a plug push plate is connected to the inner wall of the head of the head shell in a penetratingmode, a plug spring is arranged between the plug push plate and the tail of the head shell in an abutting mode, and a plug short-circuit ring is arranged on the plug push plate. A socket inner push plate penetrates through the inner wall of the base shell, a plurality of socket reeds penetrate through the socket inner push plate in the circumferential direction, a locking sleeve is sleeved outside the base shell, the tail of the socket outer push plate penetrates through a circumferential gap between the head of the base shell and the head of the locking sleeve, a socket spring abuts againstthe position between the tail of the socket outer push plate and the base shell, and a socket short-circuit ring is arranged on the inner wall of the socket outer push plate. And the socket is pluggedwith a plug by the socket inner push plate corresponding to the plug push plate. The connector does not need an external short-circuit component, is self-short-circuited under the condition of no plug-in connection, and is high in use safety performance.