Permanent magnet steel rail demagnetizing device

The invention discloses a permanent magnet steel rail degaussing device, and relates to the technical field of steel rail degaussing. A permanent magnet steel rail demagnetizing device comprises a shell and a demagnetizing assembly arranged on the inner wall of the shell. The shell comprises a top mounting plate, and a first side mounting plate and a second side mounting plate which are respectively arranged on two sides of the bottom of the top mounting plate; pulleys sliding along the steel rails are arranged at the bottom of the top mounting plate; the degaussing assembly comprises a top degaussing set, a rail head degaussing set and a rail web degaussing set which are used for generating degaussing magnetic fields which are continuously reversed respectively, the top degaussing set is arranged on the top mounting plate, and the rail head degaussing set and the rail web degaussing set are oppositely arranged on the first side mounting plate and the second side mounting plate. Due to the fact that the top d