Electromagnetic compatibility (EMC) of airborne platform has become an important limiting factor affecting the performance of platform operations. By analyzing the mechanism of electromagnetic interference of airborne platforms, describing in detail the influence of electromagnetic interference of airborne equipment on receiver sensitivity of susceptive equipment, a model for rapid system-level electromagnetic interference prediction was constructed. Finally, the methods to specifically solve the EMC problems of airborne platform were given, which were applied to several different types of aircraft. Practical tests show that the EMC of platform has a good effect and the airborne equipment works well.