The invention relates to the technical field of wood processing equipment, in particular to a finger-joint plate bonding device. The bonding device comprises a conveying plate; a finger-joint plate frame, a feeding motor and a gluing device are arranged on the conveying plate; a long-strip-shaped gap is formed in the middle of the conveying plate; conveying wheels are arranged on two sides of thegap; a plate overturning rod is arranged at the tail end of the conveying plate; one end of the plate overturning rod is a short end, and the other end is a long end; the plate overturning rod can penetrate through the gap to rotate freely; a plate arranging frame spaced from the conveying plate is fixedly arranged in the position close to the plate overturning rod and is a vertically-placed platebody; and a plate pressing cylinder, an upper plate pressing frame, a guide plate, a lower plate pressing frame and a moving bottom plate are sequentially arranged on the a plate arranging frame fromtop to bottom. Pre-finger-joining and gluing of finger-joint plates are conducted on the conveying plate, the finger-joint plates are rotated by the aid of the plate overturning rod after completion,the pre-joined plates are guided by the guide plate to enter a plate groove, and finger-joining and bonding are performed finally. By the aid of the bonding device, assembly of the finger-joint plates and bonding of plate surfaces of the finger-joint plates can be conducted simultaneously.