The invention relates to an electric furnace production process of high-purity non-quenched and tempered steel for a crankshaft. The steel comprises the following components in percentage by weight: 0.45%-0.48% of C, 1.02%-1.12% of Mn, less than or equal to 0.025% of P, 0.020%-0.030% of S, 0.20%-0.30% of Si, 0.05%-0.25% of Cr, 0.015%-0.035% of Alt, 0.07%-0.12% of V, less than or equal to 0.025% of Ti, less than or equal to 0.20% of Ni, 0.04%-0.15% of Cu, 0.01%-0.05% of Mo, 0.0080%-0.0140% of N, less than or equal to 0.0020% of O and 0.88%-0.96% of Ceq. The electric furnace production process comprises the following steps of: preparation of scrap steel, hot charging of molten iron, electric-arc furnace smelting, LF refining, VD vacuum degassing treatment and continuous casting. The steel is uniform in steel component and macrostructure and low in anisotropy and has no need of quenching and tempering treatment.