Since the discovery of R₂Fe₁₇N_y by Coey and Sun Hong, the intrinsic and extrinsic magnetic properties of these nitrides have been extensively investigated. Having very good intrinsic magnetic properties with Curie temperature of 749 K and room temperature anisotropy field of 14 T superior to Nd₂Fe₁₄B, and room temperature saturation magnetization of 1.5 T, the Sm₂Fe₁₇N_y nitride is expected to become new permanent magnet for application. The Sm₂Fe₁₇N_ynitride with intrinsic coercivity of 3T has been obtained by mechanical alloying. The Sm₂Fe₁₇N_y, magnets bonded by metal zinc have intrinsic coercivity μ_0iH_c over 0.5 T and magnetic product （BH）_maxabout 80 kJ·m^-3(