This course mainly teaches the principle of turning and milling combined machining, internship operation, writing of machining program and programming in combination with CAD/ CAM, so that students can integrate the functions and operations of turning and milling. This subject is divided into two parts, the first part focuses on the machining of the end face of the workpiece, using the C axis to drill、ream and tape holes in the axial end face, and contour milling; the second part involves more complex radial drilling, reaming, tapping and contour milling axes, and surface milling. At the beginning of the course, the tool path syntax was familiar with the handwriting program, and then the CAD/CAM was used to complete the machining program. Finally, the workpiece was processed and verified.