Provided is an automatic lifting device of a plantation plate. The lifting device comprises: a bracket (102); a workbench (104) mounted on the bracket, wherein a plantation plate in a circulating water pool enters the workbench; a lifting guide rail (106) arranged on a side wall of the workbench and transferring the plantation plate onto a root cutting line; a guide plate (108) arranged at an end portion of the workbench and receiving the plantation plate from the circulating water pool; and a commutation assembly (120) arranged between the lifting guide rail and the guide plate. The automatic lifting device of a plantation plate guides, via the guide plate, the plantation plate in the circulating water pool to enter the workbench, and then transfers, via the lifting guide rail, the plantation plate onto the root cutting line, wherein same has the features of low costs, a small amount of land occupied, a low consumption quantity of water, a high work efficiency, a quick plucking and collecting speed, and low
