The invention discloses a connector with an automatic butt locking and unlocking mechanism. The connector comprises a plug and a socket, wherein the plug comprises a cover plate, a plug shell, a ball, a ball shaft and a locking tail cover; the socket comprises a socket shell, a main key slot, a mounting flange, a shielding tail cover and an elastic clamping jaw; the elastic clamping jaw is arranged on the outer lateral surface of the socket shell and can be accommodated in the locking tail cover to realize locking and unlocking of the plug and the socket. The connector is simple in structure, quick and convenient in butt locking and unlocking, reliable in connection, good in shock and impact resistance, low in manufacturing cost and good in sealing performance, and can prevent gaseous and liquid matters or dust outside the connector from entering the connector to influence the electric performance of the connector.