Extrusion connection pipe fittings consist of a connecting body, a sealing hoop, a holding hoop and an extrusion hoop driven nut. The holding hoop is an opening spring bended by a circle of round section steel wire, with the help of the function of a wedge bar of the sealing hoop, the fixing requirement of the holding hoop is rather strong relative to the sealing for the sealing hoop, and is rather weak relative to the fixing of the holding hoop, thus effectively settling the main contradict that affects the extrusion and connecting function, i.e., the contradict that the extrusion connectingfor a double-hoop pipe requires that the holding hoop must be 'not only strong but also weak', to ensure that the sealing of the pipe extrusion connecting is more effective, the fixing of the pipe extrusion connecting is more reliable, and the detachability of the pipe extrusion connecting is better.