Abstract: Five-axis CNC milling is a core manufacturing technology for key components in the aerospace field. With the rapid development of the industry, the productivity improvement of five-axis CNC milling technology has gradually become an urgent demand for the manufacturing tasks of related components. Focusing on the two key indicators of trajectory length and feedrate for productivity improvement in five-axis CNC machining, and considering relevant constraints such as chatter, material removal, and the kinematic ability of drive axes, the difficulties and core issues of related technologies were elaborated from three aspects, namely parameter selection, trajectory optimization, and speed planning. Corresponding solutions were also provided. This work offers solution ideas and methodological references for achieving high-performance machining of five-axis CNC trajectories.