Roof deformation joint waterproof structure

The utility model belongs to the technical field of building construction, and particularly relates to a roof deformation joint waterproof structure. The top plates and the retaining wall are arranged on the two sides, the concrete cover plate covers the retaining wall, the top plates and the retaining wall are of a concrete integrated pouring structure, a waterproof steel plate is arranged in the deformation joint, the two side edges of the waterproof steel plate are pre-buried and fixed in the retaining wall, and asphalt hemp threads are filled in the deformation joint above the waterproof steel plate; a heat preservation layer, a leveling layer, a waterproof roll layer and a cement mortar layer are sequentially laid on the top plate, and a heat preservation layer, a leveling layer, a waterproof roll layer and a cement mortar layer are sequentially laid on the retaining wall from inside to outside. A plurality of cushion blocks are arranged at the upper end of the retaining wall, and the concrete cover plat