Abstract: In this paper,the electromagnetic induction heating technology is applied to the molten salt storage heating field with low valley electric heating method,and the molten salt electromagnetic induction heater is taken as the research object. The distribution characteristics of magnetic field and temperature field in the wall of induction heater and molten salt under different heating conditions are studied by numerical simulation method,and the influence of coil current,current frequency,molten salt velocity and heater material on magnetic field and temperature field are obtained. The results show that the magnetic induction intensity,the induced current density on the pipe wall,the temperature on the wall of the induction heater and the temperature rise of molten salt increase with the increase of coil current. The increase of coil current frequency will only affect the distribution of magnetic field. The wall temperature of the induction heater and the temperature rise of the molten salt decrease significantly when the velocity of molten salt increases. The maximum wall temperature of the heater are 406 and 264 ℃,When the velocity of molten salt are 0.1 m/s and 0.4 m/s,respectively,with the temperature rise of molten salt are 38.79 and 10.05 ℃. The magnetic induction intensity,the induced current density,the temperature of the heater wall and the temperature rise of molten salt are higher than that of the stainless steel material when the heater material is carbon steel under the same conditions.