The laser transceiver contains a lot of complex optical refractors. The laser signal is emitted from the laser, transmitted through the optical fiber and the transceiver, and entered into the air after multiple splitting, reflection and expansion, so as to exchange information with the outside world. The direction of the laser axis changes with the motion of the two-dimensional turntable. In the process of coupling between the laser fiber and the transceiver, the parallel light generated by the receiving and transmitting collimator should be meet the requirements of consistent divergence angel, parallelism and coincidence at the light outlet of the device. In this paper, the method optical axis consistency detection and adjustment in the process of laser coupling and turntable integration is studied, the device for determining the optical axis reference is designed. By means of precise adjustment, the optical axis and the reference device coincide precisely, and the detection and debugging of optical axis paralleling and coincidence are realized. © 2021 SPIE.