Temperature,pressure and pressing cycle are three important factors in plywood hot-press process,and they interact with each other. Hot-press cycle is a key factor affeacting product qualities under given temperature and pressure conditions. Shortening the hot-press cycle is of economic importance for plywood enterprises. Normal releasing pressure curve and broken-releasing pressure curve experiments were conducted for comparison in 15 mm thick plywood pressing. Physical and mechanical properties as well as appearances met the GB9846 1 9846 12-88 requirements.