Drainage device for constructional engineering construction

The utility model discloses a constructional engineering construction drainage device in the technical field of constructional engineering construction, which comprises a square box, a cylinder and a sediment box, the cylinder is fixedly connected to the top of the inner cavity of the square box through bolts, the sediment box is fixedly connected to the bottom of the inner cavity of the square box, the inner cavity of the cylinder is provided with a closed cavity, and the top of the cylinder is provided with a stirring cavity. A first motor is fixed to the middle of the top of the closed cavity, the tail end of a power output shaft of the first motor penetrates through the cylinder and extends into the stirring cavity, a connecting block is fixedly connected to the tail end of the power output shaft of the first motor, a disc is fixedly connected to the top end of the connecting block, and dull knives are fixedly connected to the upper surface of the disc and are sequentially arranged from left to right; by