In order to study the heat transfer characteristics of the arc staring process in industrial silicon, vasa establishing a magneto-hydrodynamic (Magneto-hydrodynamic, MHD) model of heat-flow-electromagnetic coupling in the electric arc furnace, simulated the arc discharge, the gas flow and the furnace temperature of the arc starting process, and the impact of the different current on the arc starting process are explored using COMSOL Multiphysics 5. 4 software. The results show that: under the influence of the large current applied between the two electrodes in the furnace, arc discharge occurs in a short time. The maximum temperature in the furnace Increased from 300 K to 3 610 K and the highest flow velocity rate increased from the initial static state to 1. 45 m/s in 0. 5 s. When the arcing distance between the two electrodes is 15 cm, the applied alternating current increased from 22 108 A to 62 108 A, the maximum temperature m the furnace increased from 794 K to 6 091 K, and the maximum flow velocity Increased from 0. 81 m/s to 1. 71 m/s after 0. 5 s. The fluid velocity change Is relatively concentrated, the arc locally generates strong heat convection, and a large amount of heat Is transferred to the furnace, which Is beneficial to dry the furnace. By comparing the anode surface temperature WILL the data in the literature, the mathematical model established in this paper can accurately reflect the arc starting process in the electric arc furnace, which has an important practical significance for understanding the arc starting kw in the furnace. [ABSTRACT FROM AUTHOR]