A new type of polyvinyl chloride alloy pipe widely used in chemical, gas, construction and other fields has been successfully developed by Nankai University and is currently being transferred across the country. The product uses polyvinyl chloride as a raw material and added modifiers. It is a flame-retardant high-impact polyvinyl chloride alloy pipe successfully developed through alloying technology. Its characteristics are that the raw materials can be based in China, the production cost is low, the process is stable, the production equipment is general-purpose equipment, and the production process is free of 'three wastes' pollution.