Samarium cobalt magnets are divided into SmCo5 and Sm2Co17 according to their composition. Consists of samarium, cobalt and other rare earth metal material proportioning, smelting alloy, after grinding, molding, sintering, made of a magnetic material, high magnetic energy product, low temperature coefficient, the highest working temperature is 350 ℃, no negative temperature, in operating temperature above 180 ℃, the maximum magnetic energy product and temperature stability and chemical stability than ndfeb permanent magnet materials.