The invention discloses a linkage laminated injection mold which comprises a middle cavity mold plate (1), a left core mold plate (2) and a right core mold plate (3), wherein the adopted left and right core mold plates are respectively positioned on the left and right sides of the middle cavity mold plate; the middle cavity mold plate is provided with an A cavity carrier plate, a B cavity carrier plate and a heat flow carrier plate; two mold cavities are formed in each of the A cavity carrier plate and the B cavity carrier plate; the heat flow carrier plate is provided with a head flow distributing channel, a sliding hot sprue and linkage gears; the left core mold plate is provided with a left rack, a left top plate, a left ejector oil cylinder, a left guide column, a left mold core, a left bottom plate and a left carrier plate; and the right core mold plate is provided with a right rack, a right top plate, a right ejector oil cylinder, a right guide column, a right mold core, a sprue hole, a right bottom plate and a right carrier plate. According to the linkage laminated injection mold, a laminated structure that two parting surfaces are arranged on the left and right sides of the middle cavity mold plate is adopted, and a technical scheme that four products can be simultaneously produced by adopting one mold through linkage opening-closing of the left rack, the right rack and the linkage gears, thereby achieving the injection molding production of auto airbag side cover products, and fulfilling the purposes of cost reduction and efficiency improvement.