Based　on　the　accelerated　formation　mechanism　and　preparation　process　of　the　cable　carbonization　path　in　the　low-voltage　arc　fault　testthe　preparation　results　are　classified　and　analyzedbased　on　whicha　method　for　judging　the　cable　carbonization　path　is　proposed.　In　this　methodamplitude　detectionmoving　average　filter　algorithm　and　wavelet　analysis　method　are　used　to　distinguish　four　kinds　of　preparation　results　of　cable　carbonization　pathsi.e.　under-carbonizationopen-circuit-carbonizationshort-circuit-carbonization　and　successful-carbonization.　A　simulation　circuit　model　with　high-frequency　components　of　arc　current　is　built　in　Simulink　to　analyze　and　verify　the　proposed　method.　The　proposed　method　is　further　used　to　test　the　carbonized　cable　sample　prepared　by　the　arc　fault　test　system.　The　simulative　and　experimental　results　verify　that　the　proposed　method　is　effective　and　feasibleand　can　effectively　improve　the　recognition　rate　of　the　cable　carbonization　path　preparation　results　and　the　efficiency　of　the　arc　fault　test.　©　2022　Electric　Power　Automation　Equipment　Press.　All　rights　reserved.