Abstract: In order to obtain the infrared/visible/lowlevel light images of targets, a multichannel photoelectric system optical axis parallelism calibration device was proposed. This device could easily load multichannel photoelectric detection system, it realized the adjustment for the optical axis parallism in the azimuth and pitch directions mainly through the waistshaped hole of the backplane clearance and the pad under repair backplane, to meet the optical axis parallelism not more than 15. The instrument is characterized by simply adjusting the optical system of optical axis parallelism for the first time, it is possible to achieve different detectors repeating interchangeable lenses,and the repeatable positioning accuracy is higher than 0.01 mm. In addtional,the instrument can be easily loaded on other light equipments, such as photoelectric rotary table,convenient for field experiments, which can satify the requirement for using.