Applying the Adjust Q Switch Laser Whose wave length is Q 1064nm,755nmor532nm to treat the infected pigment skin disease 290cases,fina|ly 194of the 290 were cases cared at a time,the rest was cared at twice or four times and the caring rate is 100%,that is the better way which is now to care the infected pigment skin disease.

This paper presents a new high-voltage high-speed Q-regulated switching power and describes the design of the mixed main circuit of MOS transistor and electron tube,and also some support circuit such as the interface circuit,MOS drive circuit,overflowing protect circuit and high-voltage stabilizing circuit.