In　this　paper,　a　self-powered　bidirectional　low　voltage　solid-state　DC　circuit　breaker　is　presented.　The　circuit　breaker　is　equipped　with　a　high　voltage　power　extraction　circuit　based　on　flyback　converter.　IGBT　is　used　as　the　main　switching　device　in　the　main　circuit.　The　adaptive　driving　circuit　and　absorbing　buffer　circuit　of　IGBT　are　designed,　which　can　realize　the　fast　turn-off　of　fault　current　and　effectively　suppress　the　over-voltage　spike.　Using　two　IGBT　in　parallel　as　the　main　switch　of　the　circuit　breaker,　the　fault　current　turn-off　test　of　100A　is　carried　out.　The　results　show　that　the　output　voltage　of　the　self-powered　circuit　is　stable,　the　circuit　breaker　can　quickly　cut　off　the　fault　current,　and　the　design　scheme　is　correct　and　feasible.　©　2020　IEEE.