Abstract: As a single-chip system with high integration, high performance and low power consumption, RFSOC (Radio Frequency System-On-Chip) has broad application prospects in the field of radio astronomy, especially in the digital back-end of telescopes. Radio telescopes have extremely high electromagnetic compatibility requirements, and high-speed and high-frequency RFSOC will cause severe radiation interference during operation. Aiming at solving the problems of numerous RFSOC interference sources and difficulty in quantifying the radiation intensity between different interference sources, an evaluation method of radiation level is proposed at the component level. The radiation intensity and its influence of different components are analyzed, and the electromagnetic radiation of RFSOC under different working conditions is further evaluated and analyzed at the board level. According to the electromagnetic compatibility design requirements of the telescope, the electromagnetic protection requirements are analyzed to provide important technical support for further electromagnetic protection.