The invention discloses an anti-high-speed-impact mechanism applied to a door body, which comprises a door frame fixedly arranged in a wall body and a fixing seat fixedly arranged on a wall surface; the fixing seat is arranged on one side of the door frame; the door plate is arranged in the door frame; and a cavity is arranged in the door plate. The device has the advantages that a magnetic induction wire cutting device is additionally arranged on the door body, so that when the door body is rapidly closed by strong wind, the connecting device on the door body is pulled up, and because the connecting device uses a connecting spring, the closing speed of the door body can be reduced, meanwhile, the movement of the magnetic induction wire cutting device in the door body generates an inducedelectromotive force, the induced electromotive force is used for supplying power to the motor, the connecting device connected to the door body is driven to move reversely by the motor through rotating, thereby obstructing the movement of the connecting device and slowing down the speed when the door body is in contact with the door frame, reducing the noisiness when the door frame is in contact with the door body, and the service life of the anti-theft door is prolonged.