PE pipe fittings are consumables. It consists of protective cap, upper saddle, lower support plate, blocking sealing device, connecting pressure plate, fixing bolt and other components. The saddle, protective cap, and lower support plate on the pipe fittings are made of the same material as the main pipe. A double-sided electric heating wire is installed on the inner circular arc surface of the upper saddle of the pipe fitting, and the rear wire plate is heated by an electric fusion welding machine to fully fuse with the mating surface of the electric fusion pipe fitting. After cooling, it becomes a whole.