The invention discloses an edge pressing device for laminating round plywood boards and relates to the technical field of plywood board processing application. The edge pressing device comprises a rack, a turbine motor, edge pressing mechanisms, a power distribution cabinet, a rotating shaft, a fixed disk, a sucking disk, a base, a fixed frame, a sliding block, a connection block, a support, a fixed seat, an installation seat, an air cylinder, a telescopic rod, an installation frame, a hydraulic rod, a fixing clamp, a connection rod, a connection frame, a pressing wheel and a hydraulic pump. The edge pressing device has the beneficial effects that the turbine motor is arranged on the rack to drive the fixed disk to rotate, and a plurality of edge pressing mechanisms are arranged on the outer side of the fixed disk in an equilateral triangle mode; thus, when edges are pressed, the edge pressing mechanisms are utilized to press edges of the round plywood boards which are fixed on the fixed disk and rotate along with the fixed disk, and the edge pressing mechanisms which are arranged in the equilateral triangle mode can ensure that the plywood boards can be evenly stressed; the air cylinder can drive the support to move front and back through the telescopic rod, so that the pressing wheel can right face the edges of the plywood boards to perform edge pressing processing on the plywood with different diameters.