Bond iron boron is made from the production process of magnetic powder → glue → granulation → suppression → curing → finishing → painting → magnetic → finished product packaging. Internal and external radial multipolarity, radial, multiple angle oblique filling, axial multipolarity and other methods of magnetic filling. Can manufacture a variety of complex alien products, ultra-fine, super, precision control one-time high. The magnetic energy product is three times that of sintered ferrite, and the internal endowment is high, the magnetic properties are stable, and the consistency is good. Performance fluctuations in the 5 % range, operating temperature up to 150 °C. The surface of the product is coated with epoxy resin and Perelin coating. The corrosion resistance is excellent, the surface is clean and beautiful, and there are no bubbles, cracking, peeling, flying edges, and dropping particles.