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In order to improve the quality and efficiency of blade grinding, the robot and belt grinding technologies were applied to blade machining, and the characteristics and working procees of the system were introduced. Through the comparison of multi-axial machining trajectory generation technologies, equal chord deviation fitting method and equal scallop height method were adopted to plan the robot traaectory. Because of their shortcomings in blade grinding, these two methods were improved. In order to evaluate the improved methods and compare efects of manual and robotic proceesing, a test was carried out. The experimental results show that, the blade machined by robot has much beter surface quality than that by hand. The relevant experiment validates the eefectivenees of robotic machining and the improved methods. [ABSTRACT FROM AUTHOR]