Novel efficient grinding device for machining

The utility model discloses a novel efficient grinding device for machining. The novel efficient grinding device comprises a machine body. The grinding mechanism is fixedly mounted on the machine body through a side vertical plate; and the electric expansion piece is fixedly installed in the machine body, the driving end of the electric expansion piece penetrates through an inner sliding ring base fixed to the top end face of the machine body, stretches out and then is fixedly connected with a pulling and supporting assembly, and the pulling and supporting assembly can stretch into an inner ring of a to-be-polished ring piece and conduct pulling, supporting and positioning. The tensioning and supporting assembly is used for inwards supporting and positioning the ring piece to be polished, the tensioning and supporting assembly mainly comprises the tray, the tensioning and supporting blocks and the electric cylinder, the multiple tensioning and supporting blocks are arranged on the top end face of the tray in