Disclosed is a building with a multifunctional reel-off device. The building with the multifunctional reel-off device comprises the multifunctional reel-off device arranged on the roof layer of the building, and the multifunctional reel-off device comprises a motor, rotating bodies, pull ropes and a descent control device; the motor is connected with the rotating bodies directly or connected with the rotating bodies through a transmission mechanism, the rotating bodies can rotate only in one direction and are locked and cannot rotate in the opposite direction, the pull ropes are connected to the rotating bodies, the descent control device is arranged on the rotating bodies, the pull ropes and slow descent ropes of the descent control device extend out of the rotating bodies to be then wound on the rotating bodies, and extend out of the rotating bodies, the rotatably-extended pull ropes are hung on the rotating bodies, and the rotatably-extended slow descent ropes are hung on the descent control device.