Waterproof structure of top of building outer wall

The invention relates to the technical field of building waterproofing and discloses a waterproof structure of the top of a building outer wall. The structure comprises a roof, a waterproof layer arranged on the roof and a parapet wall arranged along the peripheral side of the roof, wherein a drainage pipe used for drainage is arranged on the roof, and a crushing assembly used for crushing sundries is arranged in the drainage pipe. According to the structure, the roof, the waterproof layer, the parapet wall, the drainage pipe and the crushing assembly are arranged, the waterproof layer is used for preventing water from entering the roof, the parapet wall is used for blocking the rainwater falling on the roof, the crushing assembly is used for crushing the sundries entering the drainage pipe, and therefore the situation that the drainage pipe is blocked by the sundries is reduced, and the drainage efficiency of the drainage pipe is improved. 本申请涉及建筑防水的技术领域公开了一种建筑外墙顶部的防水结构，其包括屋顶、设置在屋顶上的防水层和沿着屋顶周侧设置的女儿墙，所述屋顶上设置有