Building waterproof construction structure

The utility model relates to the technical field of building construction, in particular to a building waterproof construction structure which comprises a first top plate arranged in an inclined mode and a second top plate arranged in an inclined mode on one side of the first top plate, a plurality of drainage grooves are formed in the upper end of the first top plate and the upper end of the second top plate, and a Z-shaped blocking plate is arranged between the first top plate and the second top plate. In rainy days, accumulated water at the upper end of the top plate can flow out along the drainage groove. And the Z-shaped barrier plate is arranged between the first top plate and the second top plate, so that the two top plates can be fixed, and external water vapor can be prevented from entering the building through a gap between the two top plates. The Z-shaped barrier plate can be elastically bent and used for supporting angle adjustment of the two top plates in the paving process, the spring supporting