Aiming at the shortages of high cost and low accuracy rate of traditional model milling machine, put forward a glass milling machine. The NC system functions include: manual control function, programming input, automatic grinding, parameter setting, failure diagnosis, system management and assistant control. Directly input the spare part figures by drawing in NC system, and the servo motor of NC milling machine (C axis) can drive the spare parts to rotate by mechanical driver. Then, the other servo motor (X axis) drives the grinding head to move linearly and mill and produces the corresponding spare parts. The practices showed that the glass milling machine control system can effectively improve the technical degree and automation degree.