This thesis researches the pc - based cnc system under windows os . the main object of this system is yag pulse laser power . a control card has been done to generate the required signal of laser power 其控制主体为yag脉冲激光电源,为了实现激光电源正常工作需要的各种控制信号,制作了基于pc机局部总线的接口控制卡。