To improve the accuracy of the laser engraving system， a high-precision laser engraving control system was presented based on STC12C5608AD.STC12C5608AD was the master controller of the system,the micro-stepping drive chip A3967SLB with converter was stepper motor drive.Two motor running was relied on a different frequency PWM controller to realize stepper motor subdivision control. Through the control system, the system could accurately and automatically move in the X-axis and Y-axis to make sculptured design. According to the number of turns of the motor, through a certain data analysis, the displacement of the slide could be calculated real-time, and it was fed back to the controller output by the display device. Experimental results show that the laser engraving control system runs smoothly,has high precision accuracy up to 0.01 mm. It has certain practical value.