Aimed at the weak anti-interference ability of traditional angle measuring system in the open field,a set of complete plan was proposed to enhance the angle measuring accuracy of CCD alignment in the wild environment. Beginning with each segment of angle measuring system,the plan analyzed various technological principles and also adopted corresponding technological steps in different segments,which mainly included technologies of semiconductor laser power constant control,optical spectrum matching and narrow-band filtering,CCD automatic changeable scan control and CCD frequency doubling interpolation subdivision,etc. The test result proves that the above mentioned method can enhance the anti-inference ability of CCD alignment in the wild environment and the system measuring accuracy.