Shaft products are widely used in various fields of machinery, such as automobile, agricultural machinery and so on, its power conversion and energy conversion plays the role Spline shaft gear is our life and production, one of the more common shaft, which is composed of three parts by the spline, flat shaft, gears, connected by means of spline points: inside and outside Spline Spline, by type, : rectangle spline and Involute Spline, Spline Shaft power transmission shaft than the other products, because the hole axis with the hub directly and evenly produced more tooth and slot, the joint acceptance more uniform; by shallow groove, the tooth root stress concentration of the small shaft and hub to weaken the strength of less; more teeth, the larger the total contact area, which can withstand greater loads; axis parts with the axis of neutral, and this high-speed and precision machinery is very important;-oriented, and this dynamic linking is very important, also has good gear transmission, the number of teeth because it more closely meshing gears meshing with the gear gap between the small role: The main control of the speed of mechanical operation, as well as mutual energy transfer, the use of the Spline gear shaft line of processing is as follows: → car at both ends of cutting surface, drilling central hole of the cylindrical Rough → → → quenched Hole Research Center Xiu → semi-refined car of the cylindrical tank cars → → → chamfering hobbing milling keyway → → → Hole Research Center repair mill → test Roughing process in our main attention is the rough size of the option (size) and must be good at both ends of the center bore, This is a test of our ability to process the first step in qualifying products, followed by semi-finishing in a certain amount of good grid positions to size, leaving a good amount of wear, including the modulation of the workpiece, heat treatment, such as heat treatment to choose the right way spline and gear machining process must be selected carefully tuned machine tools and multi-purpose model and micrometer measuring tools, in order to avoid detection errors, the final finishing phase of the various parts of the workpiece processing precision, the main mill site on the left further precision grinding process to achieve the requirements of size, after finishing the workpiece has been finished, the inspection staff to be detected, after the correct product Another shaft is between the shaft and shaft sleeve or shaft and co-ordination among the mutual Friction between them inkstone Cooperation harm caused by their own, so in order to improve the service life of shaft that we should accept a regular basis in direct torque and power lubricants, such as parts of application to extend the life of Keywords: shaft, transmission, gear, and