Abstract: A quick insertion locking connector is disclosed and includes a female connector body, a receiving joint providing with multiple limiting holes, a sliding sleeve sleeving a first boss provided on an outer wall of the receiving joint, a protective sleeve and a sealing ring. Limiting elements are arranged in the limiting holes. A second boss abuts against the outer wall of the receiving joint. A recess and a boss base extending along inside of the receiving joint are formed on an inner wall of the receiving joint. The sealing ring is arranged on the boss base and extends into the recess. Multiple limiting grooves are circumferentially formed in an outer wall of a male connector body which is configured for being inserted into the receiving joint and abutting against the sealing ring located on the boss base and the sealing ring located in the recess.