Micro hobbing technology is an extension of traditional technology in small scale for processing micro gear. The micro gear shaft which module is 0.175mm is processed by micro hobbing technology. The tooth profile of the micro gear shaft is perfect and the tooth is divided evenly, the burr of the edge is small and the surface roughness is high enough to achieve the requirements of the micro gear shaft. In paper, the design of micro gear hob and the micro hobbing technology is the key factor to the manufacture of micro gear and is presented detailed. The result shows micro hobbing is a good way to process micro gear and it has some advantages including the high efficiency, accuracy in tooth profile, lower cost and widely range of suitable materials. micro-hobbing technology has significance value to research and can be applied in manufacturing the micro gear.