Abstract:In the process of machining shaft universal joint surface,large errors always occur in tool setting process,so the machined workpiece has greater symmetry error,even out of tolerance.In order to solve this problem,considering the characteristics of the positioning device and machining parts,referring to structure of caliper,tool setting gauge of universal lifting platform milling machine was designed and applied to actual process.The results show that the designed tool setting gauge of universal lifting platform milling machine can be used to realize accurate,convenient and fast tool setting,and processing time is reduced,the quality requirements of processing are met.