Waterproof mechanism for preventing leakage of building top floor

The utility model belongs to the technical field of building waterproofing, and particularly relates to a building top floor leakage-proof waterproof mechanism which comprises a house body, a top plate arranged above the house body and two sets of supporting columns A fixed between the house body and the top plate and symmetrically arranged. Two sets of supporting columns A which are symmetrically arranged are fixed between the house body and the top plate, two sets of supporting columns B which are symmetrically arranged are fixed between the house body and the top plate, the supporting columns A and the supporting columns B are symmetrically arranged, and a waterproof assembly is further installed between the house body and the top plate. A small amount of water may permeate the top plate and drop onto the top surface of the waterproof partition plate, the dropped water flows out along the inclined direction of the top surface of the waterproof partition plate, and a conical plate is driven by a scraper to