The invention discloses a bamboo shelf board grinding mechanism, and relates to bamboo shelf board machining devices. According to the bamboo shelf board grinding mechanism and the using method thereof, the problems that existing bamboo joints on bamboo chips are uneven, burrs are arranged on most of the surfaces of the bamboo chips, then large gaps are formed between the single bamboo chips of the manufactured bamboo shelf board, and the overall compressive strength of the formed bamboo shelf board is low are solved. The mechanism comprises a grinding motor, a grinding motor output shaft, a grinding support, a grinding assembly, a joint removing machine tool and a bamboo joint board clamp assembly, wherein the bamboo joint board clamp assembly is arranged on the joint removing machine tool. According to the bamboo shelf board grinding mechanism and the using method thereof, the grinding assembly is utilized to avoid the uneven phenomenon of the bamboo joints on the bamboo chips, the burrs on the surfaces of the bamboo joints are removed, and the gaps between the machined and ground bamboo chips are reduced. The invention further discloses a using method of the bamboo shelf board grinding mechanism.