As　the　faulty　section　can　not　be　accurately　located　and　the　information　of　fault　indicator　can　not　be　automatically　transmitted　in　feeder　automation　system,　a　three-layer　distributed　wireless　monitoring　system　for　distribution　lines　is　proposed.　The　first　layer　is　the　470　MHz　short-range　wireless　communication　network,　responsible　for　the　information　collection　of　distribution　line　state　change;　the　second　layer　is　the　ZigBee　Pro　wireless　sensor　network,　responsible　for　the　routing　of　state　change　information　and　parameter　setting;　the　third　layer　is　the　GPRS　communication　network,　responsible　for　the　reliable　long-distance　data　transmission.　The　key　points　in　design　and　implementation　are　analyzed,　such　as　the　power　supply　to　the　communication　module　of　fault　indicator,　the　parameter　configuration　of　wireless　sensor　network,　the　routing　of　″multiple-to-one″,　the　network　security　and　reliable　GPRS　communication,　and　so　on.　The　system　is　suitable　for　the　on-line　monitoring　of　10　kV　distribution　lines　with　high　reliability,　flexible　expansibility　and　low　operating　expense.