Blank preparation method capable of reducing forming tonnage

The invention belongs to the technical field of forging and pressing, and relates to a blank preparation method capable of reducing the forming tonnage. Comprising the steps that S1, after an upper pressing piece and a lower mold are preheated, a release agent is sprayed to the lower surface of a pressing plate and the inner wall of a cavity, and the lower mold is placed in a forming area of forging and pressing equipment; s2, the blank is placed in the cavity; a flat anvil on the forging and pressing equipment is pressed down and positioned in advance, so that the flat anvil corresponds to the cavity; s3, the upper pressing piece is placed on a lower die, the lower surface of the pressing plate makes contact with the blank, the lower die is located between the two guide baffles, the length direction a1 of the upper pressing piece is parallel to the width direction b2 of the lower die, and the width direction b1 of the upper pressing piece is parallel to the length direction a2 of the lower die; the flat anvi