The invention discloses a roller type permanent magnet heating system. The roller type permanent magnet heating system comprises a permanent magnet roller, a rolling locating device, a heating locating device and a driving device, wherein a plurality of permanent magnets are arranged on the inner wall of the permanent magnet roller, the rolling locating device is used for locating the roller, and the heating locating device is used for locating a metal heating piece. The permanent magnets rotate around the metal heating piece. The permanent magnets generate a rotating magnetic field. The rotating magnetic field acts on the metal heating piece, so that an eddy current is generated in the metal heating piece, heat is generated, and heating is achieved. By the adoption of the roller type permanent magnet heating system, a huge transformer system needed by a traditional electric induction heater, is not needed; in addition, the permanent magnets are arranged on the inner wall of the roller, the metal heating piece is arranged in an inner cavity of the roller, in this way, when the roller rotates, the permanent magnets surrounding the inner wall of the roller can be driven to rotate around the metal heating piece, no-dead-angle heating is achieved, and the heating efficiency is greatly improved.