A preparation method for an electrode sheet, an electrode sheet, a battery, and an electric device. The preparation method for an electrode sheet includes: preparing an active layer comprising an active material and a binder on at least one side of a current collector; performing a heating treatment on the active layer to cause a temperature of a surface layer of the active layer to rise to a heating temperature; and performing a thermal insulation treatment on the active layer to cause the surface layer of the active layer to be at a thermal insulation temperature, where each of the heating temperature and the thermal insulation temperature is separately higher than or equal to a melting point or a softening point of the binder and lower than a decomposition temperature of the binder.