This protective suit is designed with a vacuum of 8.6 kPa (65 mm Hg) and a valve to prevent the vacuum from suddenly rising beyond this limit. After negative pressure is established in clothes, as long as the corrugated part is folded tightly or the rubber rope is tightened, a force can be generated and acted on the body. Under the action of force, the waist and one leg of the body are compressed; If a shoulder strap is added, its function can be extended to the whole spine. Pant legs have certain rigidity, which hinders leg movement, that is to say, this kind of clothing has the inherent performance of loading protective clothing.