On　the　basis　of　achieving　normal　communication　with　the　ARINC664　interface,　this　system　implements　a　fault　injection　mechanism　for　the　ARINC664　interface.　The　entire　system　can　introduce　up　to　eight　channels　of　ARINC664　fault　injection,　with　two　forms　of　fault:　superimposed　direct　flow　and　superimposed　common　mode　voltage.　The　system　adopts　differential　operational　amplifiers　and　fully　differential　operational　amplifiers　for　front-end　fault　injection,　and　uses　RTL8208　with　a　processor　for　back-end　data　communication.　This　article　mainly　introduces　the　specific　hardware　design　of　the　entire　system.　The　experimental　results　indicate　that　effective　fault　injection　can　achieve　anti-interference　ability　testing　of　the　testing　equipment　©　2023　Owner/Author.