Polyurethane buffer blocks have many excellent properties, including high mechanical strength, good insulation, explosion-proof, corrosion resistance, heat resistance, cold resistance, oil resistance and aging resistance. Compared with the rubber-type, spring-type and hydraulic-type buffers currently used in our country, polyurethane buffers not only have far superior buffer performance, but also have small specific gravity, simple structure, low cost, and easy installation and maintenance.