Power　converters　based　on　the　controlling　of　switching　devices　can　achieve　power　conversion　with　high　efficiency.　This　kind　of　converter　occupies　several　advantages　but　will　introduce　sever　electromagnetic　interference(EMI)　as　side　effect.　To　block　the　propagation　of　EMI　noise,　it　is　widely　used　to　add　passive　filter　or　active　EMI　filter(AEF)　into　the　converters.　With　small　size　and　decent　noise　attenuation　ability　of　AEF,　it　has　the　tendency　to　cover　the　usage　of　passive　filter.　But　different　from　passive　filter,　with　the　limitation　of　controlling　method　of　AEF,　it　doesn＇t　have　the　ability　to　attenuate　the　noise　from　both　sides.　Nowadays,　the　cascade　of　power　converters　is　becoming　more　and　more　common,　this　feature　will　limit　the　applications　of　AEF.　To　cope　with　this　problem,　this　paper　proposes　a　kind　of　bydirectional　AEF　with　double-side　sensing　method.　Based　on　the　theoretical　analysis　and　experiments,　it　can　be　found　that　this　topology　can　well　attenuate　the　noise　signals　from　both　sides　and　the　insertion　loss　is　pretty　decent.　©　2021　IEEE.