For the needs of German PITTLER-2 Horizontal Lathe Machining Center’s CNC Transformation, research CNC System for PITTLER-2 Machine. Utilized Germany Siemens 802D SL CNC SYSTEM to control two feed shafts, used PLC to achieve Switch signal linkage of 12-station turret control, hydraulic station and spindle stalls solenoid valve, applied 6RA27 DC converter system to frequency control of SIEMENS original machine spindle DC motor (40 KW, 1 500 RPM). Realized avariety functions in this machine, such as two-axis feed control, 12-station turret drive, and spindle DC motor speed control, hydraulic station spindle Shift. The project is feasible and practical, highly cost-effective.