This paper studies the radar servo multi-channel communication platform of domestic devices. Aiming at the problems of autonomous control of radar servo system hardware and complex multichannel communication, a domestic radar servo multichannel communication system based on MCU+FPGA architecture is proposed to improve the reliability, redundancy and universality of servo control. A 6way RS422 fusion structure is designed to complete the communication with each subsystem component, In addition, the device schematic design and PCB layout and wiring are completed on Altium Designer, and the 6layer stack design and physical static test of PCB are realized. The test results show that the communication system of this design meets the design requirements and can realize domestic substitution.