Building waterproof structure

The utility model relates to a building waterproof structure which comprises a preassembled wall body, a water separating part is arranged in the preassembled wall body, a monitoring part is embedded in one side of the preassembled wall body, the water separating part comprises a water separating pipe arranged in the preassembled wall body, a plurality of water separating holes are formed in the outer wall of the water separating part, and the two ends of the water separating pipe extend to the two sides of the outer wall of the preassembled wall body. The negative pressure pump and the liquid storage tank are embedded in one side of the pre-assembled wall body, the negative pressure pump is communicated with the liquid storage tank, the negative pressure pump is communicated with the water separating pipe through a first connecting pipe, and the valves are installed at the two ends of the water separating pipe respectively. Based on the active drainage structure, compared with a fixed protection part of a wa