The invention relates to a refined surface treatment system for gear manufacturing. The system comprises a power device, a clamping device and a gear rotating device. The clamping device is fixedly mounted at the left end of the power device, and the gear rotating device is fixedly mounted at the right end of the power device. The system can solve the problems when a tooth space of an existing gear is burred and polished: I, it is inconvenient to remove the tooth space of the gear manually and burrs are remove halfway; II, gears of different modes cannot be burred and the burs are removed insufficiently when a machine is used for removing the burrs of the tooth space of the gear; and III, iron scraps cannot be eliminated timely during machine polishing to affect the smoothness of the toothspace. The system can achieve a function of removing the burrs of the tooth space of the gear intelligently, is more full and uniform to polish the tooth space of the gear and is better in polishingeffect of the gear, so that the work efficiency is improved greatly.