Locking thread with 30° wedge ramp is a new type of anti loosening thread that changes the shape of the tooth profile of the internal thread to eliminate the transverse clearance of the thread on the basis of the ordinary 60° pipe thread. In view of the phenomenon of tool wear and breaking edge in the processing of the existing profiling tool, the macroprogram variable was skillfully applied to design the general macroprogram of the wedgeshaped thread CNC turning of the layered cutting. The request of applying standard lathe tool to cut the different specifications of the wedgeshaped thread characteristic parts is realized, and the repeated programming is avoided. It is high rate, high precision and high flexibility.