The processing techniques including output power,frequency,cutting speed,pulse width and assistant air pressure, which influence the laser cutting quality of key board for mobile,have been studied with the fiber laser precision cutting system. The best processing techniques have been gained with the analysis and experiments. The high quality keystrokes for mobile have been cut with the output power of 25 W,the repeat frequency of 1800 Hz,the pulse length of 0.3 ms,the oxygen gas pressure of 0.25 MPa and the scanning speed of 8 mm/s.