The invention discloses an efficient automatic stacking device which comprises a thin cylinder, a link device, a rodless cylinder and a rack. A transporting trolley is mounted on one side of the top of the thin cylinder; the link device is mounted at the top end of the thin cylinder and in the rack; a steel wire mesh frame is mounted on the transporting trolley; a tray is mounted on the outer sideof the steel wire mesh frame; a feeding guide plate is mounted at the top of the steel wire mesh frame; and plum-blossom handwheels are mounted on the outer surfaces of two sides of the tray. A partof the top end of a piston rod of the link device is positioned on the inner side of the feeding guide plate, after the stacking is finished, the thin cylinder drives the link device to lower the trayfor a certain height, so that the structural stability of the feeding guide plate and the steel wire mesh frame can be effectively stabilized, and meanwhile, after the steel wire mesh frame is fixed,the thin cylinder drives the link device to be continuously downwards moved to the bottom of the tray, and the rodless cylinder pushes the transporting trolley to send out the tray, so that the traycan be sent out timely, and the stacking efficiency is improved.