Abstract: End tooth chip groove is an additional groove structure near the end tooth cutting edge of the end mill. By reducing the width of the cutting edge, it can achieve the functions of easy chip breaking, chip curling and discharge, thereby achieving the purpose of improving tool life. At present, the research on the function and structure design of the end-tooth chip groove in the end mill has been quite perfect, and there are still few in the CNC grinding process. Therefore, in order to meet the design requirements of different types of end mill chip cutters, this paper proposed a numerical control grinding process for chip cutters with parameterized structure and position definition, and derived the corresponding grinding wheel grinding trajectory algorithm. Then based on the obtained grinding trajectory and the five-axis NC tool grinder motion principle, and the NC program required for end tooth chip groove grinding was solved by VC++ programming. Finally, the accuracy of the grinding trajectory was verified by grinding simulation and actual machining tests, and the accuracy and effectiveness of the grinding trajectory were verified.