The utility model discloses an EMC circuit applied to a fluorescent lamp, which comprises a filter circuit and a rectifier circuit. The filter circuit is composed of a common mode inductor Ll, a common mode inductor L2 and a capacitor C1. The common mode inductor L1 is connected with the two ends of a power supply. The common mode inductor L2 is connected in series with the common mode inductor L1 and then is connected in parallel with the capacitor C1. The entire rectifier circuit is in the form of a rectifier bridge DB1 composed of four diodes. The input end of the rectifier circuit is connected with the two ends of the capacitor C1, and the output end of the rectifier circuit is connected in series with a differential mode inductor L3 and a capacitor C2. The two ends of the capacitor C2 are functioning as the output ends of the EMC circuit. According to the technical scheme of the utility model, the design of the EMC circuit is improved, and the number of parts is reduced. The production cost is lowered. Therefore, the occupation space of the EMC circuit module is smaller, so that the EMC circuit is suitable for large-scale production.