“The rotating laser scanning system is a spatial multi-target parallel angle sensing system, and its light source performance is crucial to the system accuracy. To solve the problem of light source introduction, researchers have innovatively designed a new shaft structure that uses optical fibers to introduce light sources from the outside. However, when the laser passes through the axis and enters the mirror group, tilting the incident cylindrical mirror will cause a change in the scanning surface shape. To solve this problem, researchers have proposed a laser optical axis attitude adjustment method based on parallel line transitivity, and established a calibration method for optical axis tilt error. The experimental results show that after adjustment, the spatial angle between the optical axis and the axis of the rotating shaft is less than 0.15 °, which meets the requirement of the straightness of the scanning light section center for the angle of the laser incident cylindrical mirror. This research achievement not only improves the measurement accuracy of the system, but also provides strong support for the application of rotating laser scanning systems in industrial measurement and other fields.”