Plastics and traditional materials are different, the pace of technological progress is faster. The emerging new technologies, new materials and new processes make the advantages of plastic pipes over traditional materials more and more prominent. Compared with the traditional metal pipe and cement pipe, the plastic pipe is lighter in weight, generally only 1/6-1/10 of the metal pipe. It has better corrosion resistance, impact resistance and tensile strength. The surface of the plastic pipe is smoother than that of the cast iron pipe, and the friction coefficient is smaller, the fluid resistance is smaller, and the energy consumption of water conveyance can be reduced by more than 5%. The comprehensive energy saving and manufacturing energy are better. The consumption is reduced by 75%, the transportation is convenient, the installation is simple, and the service life is as long as 30-50 years. Polyethylene pipes have developed rapidly in the world. The application of polyethylene pipes in water supply and gas fields in developed countries has taken an absolute advantage. Polyethylene pipes are not only widely used to replace traditional steel pipes, cast iron pipes, etc., but also to replace polyvinyl chloride pipes. The reason lies in the technological innovation of polyethylene pipes. On the one hand, material has made great progress. Through the improvement of polyethylene polymerization process, the strength of special material for polyethylene pipe has almost doubled. On the other hand, there are new developments in the application technology, such as the technology of laying polyethylene pipe by directional drilling without digging trenches, giving full play to the advantages of polyethylene pipe, so that traditional pipes have no competitiveness when it is suitable to use this method. Many new materials and technologies are being studied, or have been developed and tested. It is certain that the technological progress of plastic pipes in the next 10 years will promote the development of plastic pipes more rapidly and broadly.