Magnetic resistance brake, braking system and vehicle

The invention relates to a brake and aims to solve the problem of abrasion caused by contact friction braking during braking of an existing brake. The invention provides a magnetic resistance brake, a braking system and a vehicle. The magnetic resistance brake comprises a brake disc made of metal conductive materials and a brake box provided with a permanent magnet, a reset spring and an oil cylinder, an oil cylinder piston is fixedly connected with the permanent magnet, and two magnetic pole gaps of the permanent magnet are opposite. When the permanent magnet is pushed to the braking position by the oil cylinder, the brake disc is located in a gap between the two poles of the permanent magnet, and when the permanent magnet is pushed to the braking release position by the reset spring, the permanent magnet is located on the radial outer side of the brake disc. The braking effect of the magnetic resistance brake is based on the magnetic damping effect, direct contact friction is avoided, and the problem of abr