The invention discloses a dust removing system for wood platy parts. The dust removing system comprises a rack, a conveying belt, driving rollers, driven rollers and brush rollers, wherein the driving rollers and the driven rollers are arranged at the two ends of the conveying belt, and the brush rollers are arranged above the conveying belt. A dust collecting cover is arranged at the part, in front of the brush rollers, above the conveying belt, a draught fan opening and a first dust suction inlet are formed in the part, close to wood plates and in the dust collecting cover, of a cover opening of the dust collecting cover, the draught fan opening is located in front of the first dust suction inlet, the brush rollers comprise the first brush roller and the second brush roller which are arranged in a front-and-back mode, a second dust suction inlet and a third dust suction inlet are formed over the first brush roller and the second brush roller respectively, the first dust suction inlet, the second dust suction inlet and the third dust suction inlet are connected with a dust collector away from the wood plates, and a vibrating motor is further arranged on the bottom face of the rack. By means of the dust removing system for the wood platy parts, small particles on the wood plates can be thoroughly removed and are sucked into the dust collector by all the dust suction inlets through powerful suction force, the collected small particles are prevented from falling back on the wood plates again, the wood plates are kept clean, and the dust removing effect is improved.