The invention discloses a multifunctional robot paper pile dismounting grasper, comprising a grasper base frame, a paper board grasping mechanism, a wood board sucking component and a tray grasping mechanism, wherein a grasper mounting plate is fixed on an upper mounting rack of the grasper base frame, and is connected with a robot arm by virtue of a flange tube arranged at an upper part; the paper board grasping mechanism is arranged on a lower mounting rack of the grasper base frame; the wood board sucking component is arranged on a back mounting rack of the grasper base frame; the tray grasping mechanism comprises a tray grasping component and a cylinder driving component for driving the tray grasping component to rotate; the tray grasping component is arranged on left and right mounting racks of the grasper base frame; and the cylinder driving component is arranged on a front mounting rack of the grasper base frame. The multifunctional robot paper pile dismounting grasper disclosed by the invention can achieve automatic pickup of paper boards, automatic suction of wood boards and automatic grasping of trays, and can judge front and back surfaces of the paper boards at the same time, thereby achieving full-automatic paper pile dismounting, and greatly reducing the labor intensity.