The damage rate is high, the service life is short, and there are some problems in intelligent control chamber in xinjiang,research on the optimization scheme of 220 kV control cabinet is proposed.A three - dimensional model of a 220 kV substation in xinjiang was built by using modeling software,The finite element method is used to study the steady state electromagnetic field distribution in substation,The comparison between simulation data and field test data verifies the accuracy of the electrical model,A spatial optimization method was used to obtain the optimal installation location of the intelligent control chamber.The mean error of power frequency electromagnetic field simulation and experimental comparison data of 228 measuring points is 5.3%,meet the requirement of 7% allowable fluctuation of substation voltage.The orthogonal experiments of the attenuation velocity of the power frequency electromagnetic field in the direction of parallel input and output line (X), vertical bus line (Y), and mounting height (Z) show that,The rate of decay is most significant in the Y direction,220/110 kV side at (2,10,2) and (1.5, 6,2) meters to obtain the optimal installation position scheme.The results provide some theoretical references for further research on the changing characteristics of power frequency electromagnetic field and the optimization of installation path of secondary equipment in substation.