The EMC design is one of the important parts of the products design. In this paper, as a spread spectrum transceiver of the satellite communications example, the design methods and related measures are analyzed from electromagnetic shielding, PCB design, chassis design, grounding, filtering method and so on. The author puts forward the idea of overall planning and flexible design combined with specific circuit, the necessary measure withshielding, filtering and grounding. The idea and method is a good reference to improve the EMC design level of electronic products and electronic engineering system.