High-voltage　light-emitting　diode　has　the　characteristics　of　high　working　voltage,　small　drive　current,　high　efficiency,　high　reliability　and　low　energy　consumption,　which　has　been　widely　studied　and　applied.　This　paper　first　introduces　the　basic　principle　of　high-voltage　LED,　classification　and　structure;　Then,　the　latest　research　progress　of　the　key　fabrication　technology　of　high-voltage　LED　is　described,　from　the　point　of　optimizing　the　photoelectric　characteristics　of　the　devices;　The　reliability　of　high-voltage　LED　are　discussed　from　the　aspect　of　failure　mechanism　and　thermal　characteristics　as　well;　Finally,　its　development　and　application　prospects　are　prospected.