Prestress laser bending forming method for aluminum alloy high-ribbed wallboard

The invention provides a prestress laser bending forming method for an aluminum alloy high-ribbed wallboard. The prestress laser bending forming method comprises the steps that S1, a plurality of to-be-formed areas are divided on the breadth of the aluminum alloy high-ribbed wallboard; S2, any to-be-formed area is selected to be subjected to pre-bending loading, so that the to-be-formed area enters slight plasticity; S3, a laser beam is used for scanning ribs with concentrated elastic stress in the to-be-formed area; S4, after the aluminum alloy high-ribbed wallboard is cooled to the room temperature, unloading is conducted, and forming of the to-be-formed area subjected to pre-bending loading is completed; and S5, the step S2, the step S3 and the step S4 are repeated in sequence for the rest to-be-formed areas, and an aluminum alloy high-ribbed wallboard bending forming piece is obtained. The pre-bending loading is carried out on the to-be-formed areas, so that the to-be-formed areas enter slight plasticity,