High-temperature-resistant polypropylene pipe

The utility model provides a high-temperature-resistant polypropylene pipe which comprises an inner-layer supporting component, an outer-layer supporting component, a switching positioning component, a filling heat preservation component, a temperature-resistant gasket component and an outer-layer covering component. The containing space between the bearing inner pipe and the bearing outer pipe is divided into the positioning cavities, the positioning cavities are filled with the heat preservation layer plates made of polyurethane foaming plastic, the heat preservation layer plates can be placed in or taken out from the positions between the adjacent transfer supporting plates, assembling is convenient, follow-up maintenance is convenient, and the service life of the heat preservation layer plates is prolonged. And the liner inner pipe mounted in the supporting inner pipe is formed by filling a plurality of layers of carbon fiber gridding cloth with polyimide resin, so that the high-temperature resistance of