With the rapid development of renewable energy, electrothermal energy storage technology has become a key technology to solve the problem of new energy consumption. However, the traditional solid electrothermal energy storage device with resistive heating has many problems, such as long heating time, uneven temperature, easy aging of resistive elements, single heat storage material, and complex high-voltage insulation. [Methods] To solve these problems, this paper proposes a solid electrothermal energy storage device based on induction heating. Multi-physics field coupling simulation analysis is carried out using COMSOL Multiphysics software. [Results] The results show that the use of cast iron as the heat storage material has good heat storage and heat transfer characteristics. Meanwhile, the temperature rise rate of the heat storage stage reached 8.5 ℃/min using induction heating, and the induction heating significantly improved the heating rate and the homogeneous temperature of the heat storage body. [Conclusion] The device has the advantages of fast heating speed, good temperature uniformity and high heat storage performance, which can effectively solve the problem of new energy consumption and provide new possibilities for the flexible response of the future power market.