Vacuum debugging process for light cavity of high-power gas laser

The invention discloses a vacuum debugging process for a light cavity of a high-power gas laser, which comprises the following steps of: fixing and adjustment of a telescope: cross scale marks in the telescope and mounting ports at two sides of a box body corresponding to the cross scale marks are arranged coaxially; preliminary adjustment of the light cavity: an angle adjusting module is adjusted to enable the cross scale marks of the telescope before and after reflection of each optical lens to be overlapped, and the angle variation of each optical lens is monitored through an optical axis monitoring system; vacuum correction of the light cavity: a laser box body adjusts the corresponding variation generated by each monitoring system in a vacuum condition and the overlap ratio accordingto the horizontal overlapping condition of the cross scale marks of the telescope, and the laser box body adjusts the angle adjusting modules of a front window lens module under a standard air pressure to enable the images of