The invention discloses a bituminous waterproof sheet material which comprises a tire basic layer, wherein the two sides of the basic layer are symmetrically provided with modified bitumen layers, surface layers are spliced on the outer sides of the modified asphalt layers, and the materials of the modified bitumen layer are autohesion rubber bitumen. The bituminous waterproof sheet material provided by the invention has the advantages of simple structure, ageing resistance, high tensile strength and low use and maintenance costs.