The invention discloses a dual-drive polishing device for machinery manufacturing. The dual-drive polishing device comprises a moving mechanism, a drive box, a motor I, a driven gear I, a driving gearI, a driving belt pulley I, a polishing motor I, a drive belt I, a driven belt pulley, an end cover, a polishing motor II, a drive belt II, a driving belt pulley II, a driving gear II, a motor II, adriven gear II, a bearing, a fixing cover I, an outer sleeve, an inner sleeve and a drive shaft. The dual-drive polishing device is reasonable and simple in structure, low in production cost and convenient to mount; the motor II and the motor I are arranged, the polishing angle of a grinding wheel can be effectively adjusted, the requirement of polishing of different surfaces of the same part is met, and the polishing efficiency and accuracy are improved. The motor I and the motor II are both stepping motors, so that accurate control through the prior art is facilitated. A transition end surface gear is arranged and can effectively transfer power of polishing motors to the grinding wheel, and the adjustment of different angles of the grinding wheel is not affected.