In　order　to　improve　the　fault　tolerance　ability　of　distribution　network　fault　location　under　large　area　communication　fault,　an　analytical　model　for　fault　location　of　distribution　network　considering　the　missing　and　false　positives　of　FTU(Feeder　Terminal　Unit)　is　built　based　on　the　existing　fault　location　model　of　distribution　network.　In　order　to　improve　the　feasibility　of　the　model,　the　variable　dimension　of　the　objective　function　is　reduced　to　three　times　the　number　of　nodes　under　the　constraint　of　the　fault　contradiction　hypothesis.　The　variable　dimension　is　further　reduced　through　the　construction　of　hierarchical　fault　location　model　based　on　the　analysis　of　the　distribution　network　topology　and　engineering　equipment　configuration.　In　addition,　the　hierarchical　analytical　model　can　use　the　fault　location　results　of　the　second　layer　to　verify　the　location　results　of　the　first　layer,　which　makes　the　fault　location　more　accurate.　Analytical　results　show　that　the　analytic　hierarchical　model　considering　the　missing　and　false　positives　of　FTU　can　not　only　greatly　improve　the　accuracy　and　fault　tolerance　ability　of　fault　location　in　distribution　network,　but　also　synchronously　acquire　the　warning　information　of　FTU　for　missing　and　false　positives.　©　2019,　Electric　Power　Automation　Equipment　Press.　All　right　reserved.