Permeable asphalt road structure

The utility model relates to a permeable asphalt road structure which is sequentially provided with a surface layer, a base layer and a subbase layer from top to bottom, drainage grooves are formed in the two sides of a permeable asphalt road, a first drainage pipe is arranged at the bottom of the surface layer, and in the horizontal direction, the first drainage pipe is perpendicular to a main body structure of the asphalt road and extends out of the two sides of the road; a water outlet is formed in the bottom of the part, outside the asphalt road, of the first drainage pipe, the water outlet is higher than the bottom of the drainage groove, and a plurality of permeable holes are formed in the upper surface of the asphalt road part of the first drainage pipe in the length direction; the asphalt road structure further comprises a negative pressure device, the negative pressure device comprises a piston and a push-pull device connected with the piston, the piston is arranged in the first drainage pipe, the pe