The soles of safety shoes are made of polyurethane material by one-time injection molding, and the soles can have the functions of oil resistance, abrasion resistance, anti-smashing, puncture resistance, acid and alkali resistance, anti-static, insulation, and waterproof. It is 2-3 times more wear-resistant than ordinary rubber soles. It has the advantages of light weight, good flexibility, environmental protection and no odor.