Preparation method of electric steel board

The invention belongs to the technical field of building materials and processing thereof, and discloses a preparation method of an electric steel board. The preparation method comprises the preparation of wrapping layers and the preparation of a core layer, wherein the wrapping layers and the core layer are correspondingly subjected to material preparing, smelting, degasing and filtering, pouring, homogenized annealing, sawing and surface treatment, so as to obtain wrapping layer and core layer casting boards; the treated casting boards are subjected to combined welding, preheating and hot rolling, cold rolling, intermediate annealing, cold rolling, solution treatment, and aging treatment based on the sequence of the wrapping layer/ the core layer/ the wrapping layer, so as to obtain the electric steel board. According to the preparation method, double-casting structural aluminum alloy is subjected to combined rolling, so that the interface combining effect is good, the product intensity and corrosion resist