The utility model belongs to technical field of monocrystalline silicon cutting and grinding, and provides an automatic offcut transmission mechanism of a monocrystalline silicon cutting and grinding integrated machine. The automatic offcut transmission mechanism comprises a synchronous belt, a blanking mechanism, a feeding mechanism and a feeding stopping mechanism; wherein, the blanking mechanism includes an air cylinder, a turnover mechanism movable block, a turnover mechanism fixed block, a turnover plate connecting block, an offcut turnover plate, and an offcut turnover plate. The feeding stopping mechanism comprises a row of rollers mounted on a fixation plate, and photoelectric sensors which are arranged on both sides of the rollers; the feeding mechanism comprises a motor, a rotation shaft, a shaft coupling, a driving wheel, and a driven wheel; the feeding stopping mechanism is arranged on the tail end of the synchronous belt, and the bearing is arranged in the roller. The offcut can be transmitted in the unmanned way, so that the production efficiency is improved, the safe production is ensured and the labor intensity is reduced.