The invention discloses a dry magnetic separator with introduced wind power and a mineral magnetic separation method. The dry magnetic separator comprises an outer shell, a feeding device, a ventilation roller barrel, an unloading roller, a concentrate hopper and a tailings hopper, wherein ventilation roller barrel is arranged in the outer shell in a horizontal rotation manner; a low-frequency alternating magnetic field is arranged at the surface of the ventilation roller barrel; a plurality of through holes are uniformly formed in the surface of the ventilation roller barrel; ventilation materials are embedded into the through holes; the ventilation roller barrel is provided with a closed inner cavity; pressure air is introduced into the inner cavity; the feeding device corresponding to the ventilation roller barrel is arranged at the top of the outer shell; the unloading roller is arranged at the right side of the ventilation roller barrel; the concentrate hopper is correspondingly arranged below the unloading roller; the tailings hopper is correspondingly arranged below the ventilation roller barrel. According to the device and the method, the wind power is introduced into the separation and sorting processes of magnetic materials, so that the wind power, gravity and centrifugal force together directly take part in completion with magnetic force, and further the recovery rate of magnetic mineral can be obviously increased, and the concentrate grade is obviously promoted.