The invention relates to the field of dry-type magnetic separation equipment, and discloses a dynamic magnetic field dry separation system. The dynamic magnetic field dry separation system comprises a dynamic magnetic field separation device, a belt conveying device, an automatic material layer uniform distribution device and feeding devices. The dynamic magnetic field separation device comprises an outer barrel and a dynamic magnetic system which is arranged inside the outer barrel and is coaxially arranged with the outer barrel. The belt conveying device comprises a belt driving roller and belt anti-deflection carrier rollers. The belt driving roller and the outer barrel are connected through a conveying belt. The belt anti-deflection carrier rollers are evenly arranged at the bottom of the conveying belt. Multiple sets of the feeding devices are arranged above the conveying belt side by side in a spaced mode. The automatic material layer uniform distribution device is also arranged above the conveying belt and used for controlling the material thickness. An induction unloading roller and the outer barrel are arranged in parallel, and the induction unloading roller is driven to rotate by magnetic induction force generated by rotation of the dynamic magnetic system. By means of the dynamic magnetic field dry separation system, the concentrate grade and discard rate can be increased, and the separation efficiency can be improved.