Abstract: Electronic cam is of great significance for modern automation equipment. The use of computer and software technology to carry out the design optimization and control of electronic cam system has promoted the development of electronic cam curve related technology. A complete electronic cam curve is analyzed by using the method of connecting key position control points with high-order polynomial. The design process is clear and the calculating is easy to realize by program. This method can be more convenient to design in line with the expected motion law, and is very suitable for the production equipment which needs to carry out multi-axis synchronous machining.