The invention discloses a power frequency core electric furnace production stop and production recovery cold start boiler melting process in zinc casting. According to the process, the aim of controlling hearth temperature is achieved through regulating and controlling the fluctuation of voltage of an electric furnace inductor, the blowing out operation of the electric furnace is completed by spending 7 days; when production is recovered and melting is started, the temperature is gradually risen by spending 10 days, and the cold body melting and electric furnace temperature rising are completed. According to the process, a fire-resistant construction furnace lining can be uniformly expanded and shrunk when the deformation and cracking easily occur, the occurrence of cracks is prevented, the dismantlement and reconstruction cost of fire-resistant construction materials is reduced, the heat preservation power consumption cost is avoided, the resource waste is reduced.