Abstract: The electromagnetic coupled cryogenic system was designed and developed. The cryogenic temperature,cryogenic time, magnetization intensity and magnetization time were selected as the treatment parameters to study the effect of electromagnetic coupled cryogenic treatment on the wear resistance of cemented carbide. The theoretical modeling between parameters and performance were obtained by response surface method, and the analysis of variance was carried out. The results show that the reasonable process parameters cryogenic temperature, cryogenic time, magnetic field strength, and magnetization time are-190 ℃, 24 h, 1.5 T and 15 s respectively. Compared that with heat treatment, the wear resistance of cryogenic treatment and electromagnetic coupled cryogenic treatment increase by 23.38% and 35.56%, respectively. Through microstructure analysis, it is concluded that more transformation after electromagnetic coupled cryogenic treatment from α-Co to ε-Co is the reason for the enhancement of wear resistance.