When the blast occurs, the blast-resistant door obstructs shock waves generated by the blast, so that it safeguards the safety of personnel and equipment in a building. It is made of galvanized steel, and anti-corrosive paint is sprayed externally. Sealing strips are inlaid around the door frame, which can ensure tightness and tranquility as well as prevent poisonous gas from flowing when the door is closed. Fireproof rock wool is provided inside the door, and it has the functions of fire prevention, inflaming retarding, etc.