The invention discloses a concentric permanent magnetic gear magnetism regulation ring device and a production method thereof. The device comprises a magnetism regulation pole piece, support pins, a left end ring, a right end ring, a left end nut and a right end nut, wherein the magnetism regulation pole piece is connected with the left end ring and the right end ring as a whole through the support pins, the left end nut and the right end nut respectively. In the invention, the traditional technology is adopted for processing and production; and in comparison with the casting method commonly adopted at home and abroad, the traditional technology has the advantages that the production period is short, the production cost is low, the processing precision is easy to guarantee, and the like. The support pins are of a columnar structure and are uniformly distributed along the circumferential direction of the magnetism regulation ring; and compared with a rectangular or I-shaped structure, the precision and rigidity of the whole structure of the magnetism regulation ring are improved. The circumferential through-hole fit between the support pins and the magnetism regulation pole piece is the simplest and most common hole-shaft fit in the machining technology, so that the processing and assembly are convenient, and the positioning precision and stability among the parts of the magnetism regulation pole piece are promoted.