Abstract: The application of wireless laser communication has been increasing recently; therefore, design of a portable, fast network wireless laser communication base station is very important. This paper mainly focuses on the structure of the mobile wireless laser communication base station and the adjustment of the parallelism of 5 optical axes, and meets the needs of communication in the final system. The paper introduces the fixing and adjusting mechanism of the right angle prism in communication receiving system, analyzes the error of the parallelism of 5 optical axes. The result satisfies the requirement that the depth of parallelism is 10.