Abstract: When designing a multi-channel frequency conversion system, modules with corresponding functions need to be placed in the limited equipment space. This requires that in the design of the module, the volume should be as small as possible, the functions should be as many as possible, and the integration should be as high as possible when meeting the performance indicators. In this paper, a frequency conversion module using miniaturized frequency source, RF signal through wall technology and integrating local oscillator power divider is designed. On the premise of ensuring functionality and performance, compared to traditional design methods, the design method mentioned in this article effectively reduces the volume and weight of component modules to 70% and 50% of the original, which is conducive to the miniaturization and generalization of the system. The feasibility and effectiveness of the scheme are verified by the processing and testing of the actual components.