Polyurethane insulation directly buried prefabricated pipes are widely used in fields such as construction and heating. Firstly, the corrosion resistance performance of polyurethane insulation directly buried prefabricated pipes. Due to the adoption of special anti-corrosion technology, this pipeline has extremely strong corrosion resistance ability and can be directly connected to the secondary pipe network of users without worrying about various risks brought by the corrosion of steel pipes.