Anti-seepage building structure

The utility model relates to the technical field of building construction, in particular to an anti-seepage building structure which comprises a building top layer and a parapet wall arranged on the building top layer. A water baffle is arranged on the inner side surface of the parapet wall, a connecting part is arranged between the lower end of the parapet wall and the top floor layer, and the water baffle covers the connecting part on the side surface; a drainage groove is formed in the lower end of the water baffle and located in the side, away from the parapet wall, of the water baffle, and the drainage groove is embedded in the floor top layer with an opening facing upwards. According to the preferable scheme, through the water baffle and the drainage groove, rainwater can be prevented from directly dripping and eroding the joint of the root of the parapet wall and the top floor, and the rainwater can be directionally collected and treated and is prevented from being accumulated and permeating into the j