The utility model provides a drainage is multilayer real wall pipe of crowded polyvinyl chloride altogether for blowdown, including a pipe body, the body includes that high strength is outer, the regenerate bed of material and high strength inlayer, the regeneration bed of material is the multilayer, high strength is outer, the bed of material is regenerated to the multilayer and the crowded connection altogether of high strength inlayer, thickness between high strength skin, the regeneration bed of material and the high strength inlayer is than being 1: 1.2 1.3: 1.