This　paper　attempts　to　present　a　concise　review　of　the　research　done　around　parametric　fault　diagnosis　methods　for　power　electronic　circuits,　including　model-based,　knowledge-based,　signal-based　and　other　emerging　fusion　methods.　Comments　on　the　advantages　and　constraints　of　various　methods,　are　also　given.　Finally,　combined　with　the　bottlenecks　faced　by　the　current　parametric　fault　diagnosis　field　of　power　electronic　circuits,　the　new　trends　of　future　research　in　this　field　are　discussed.　©　2019　IEEE.