The utility model relates to a road engineering technical field especially relates to a porous asphalt road surface structure with prevent stifled function, include that preventing of laying in proper order blocks up structural layer, porous asphalt layer, well surface course, lower surface course, basic unit, underlayment and road bed, prevents that stifled structural layer and porous asphalt layer width are equal from top to bottom. The utility model discloses porous asphalt road surface structure is laid on porous asphalt layer surface and is prevented stifled structural layer, combine together with the porous asphalt layer, can prevent that the dust from getting into in the porous asphalt layer space, guarantee space intercommunication is not blockked up, emergency vehicle way porous asphalt layer space has prevented owing to being blockked up and is caused runway and passing lane porous asphalt layer to gather the rainwater, the damage by water evil, guaranteed that the drainage of porous asphalt layer is unblocked, porous asphalt layer function durability has been improved simultaneously, and its simple structure, construction convenience, the practicality is strong, can wide application in the engineering.