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As the fourth generation of green light source,LED is a solid cold light source,with high efficiency,long service life,safety,environmental protection,small volume,fast response speed,and many other advantages,is applied widely in the city landscape,traffic signals and commercial advertisement.And LED streetlight as has an important position in city public facilities,plays an important role in the process of city construction.This paper mainly studies LED streetlight industry technology development,and verifies the industry technology development from the patent analysis.Firstly,this paper studies LED streetlight technology analysis.Mainly include key technology、technology development trend ect.Then,through searching existing LED streetlight patents.Analysis existing Chinese patent,US patent,Japanese patent,Korean patent,include base situation analysis、main applicant and inventor analysis、technology effort analysis and technology route analysis etc.Finally,combines industry chain technology analysis with patent analysis,draws a conclusion on existing streetlight development trend,and prospect the next technology development.