Fan brake structure

The invention provides a fan brake structure. The fan brake structure comprises a fan, a brake structure and an elastic component, the fan is provided with a frame body and a fan wheel, the frame body is vertically provided with a shaft barrel, the fan wheel is vertically provided with a shaft center and is pivoted in the shaft barrel, and the free end of the shaft center is provided with a cutting groove; the brake structure is arranged at the bottom of the shaft barrel and is provided with a brake plate and an electromagnet, a brake pin is convexly arranged at one end of the brake plate, and a magnetic part is arranged at the other end of the brake plate; the elastic assembly abuts against the position between the braking vane and the electromagnet. When the fan is powered off, the electromagnet is powered on to generate a magnetic pole, the magnetic pole and the magnetic piece generate mutual repulsion force, the brake plate moves towards the axis, the brake pin enters the cutting groove to be clamped to g