Gallium　nitride　(GAN)　based　power　light　emitting　diode　(LED)　has　the　advantages　of　energy　saving,　environmental　protection,　long　life　and　so　on.　It　has　a　wide　range　of　application　prospects　in　the　fields　of　lighting　and　display.　Although　its　performance　has　been　improved　in　recent　years　and　the　products　are　becoming　mature,　the　new　LED　structure　will　still　bring　new　reliability　problems.　Therefore,　it　is　of　great　significance　to　carry　out　photoelectric　performance　test　and　accelerated　aging　life　test,　and　analyze　its　reliability　and　failure　mechanism.　In　this　paper,　the　initial　photoelectric　parameters　of　1W　GaN　based　blue　LED　with　or　without　current　blocking　layer　(CBL)　are　tested.　The　two　kinds　of　LEDs　are　divided　into　four　groups　named　A1,　A2,　B1　and　B2　for　accelerated　life　aging　test.　The　devices　selected　by　A1　and　A2　are　LED　with　CBL;　the　devices　selected　by　B1　and　B2　are　LED　without　CBL.　The　accelerated　life　test　of　A1　and　B1　devices　is　conducted　at　700mA/25,　and　the　accelerated　life　test　of　A2　and　B2　devices　is　conducted　at　900mA/25.　During　the　experiment,　the　interval　time　of　photoelectric　parameter　measurement　is　determined　according　to　the　actual　situation　of　the　experiment　and　the　measurement　of　photoelectric　parameters　such　as　luminous　flux,　luminous　efficiency　and　forward　voltage,　etc.　is　completed.　The　results　showed　that　the　luminous　flux　attenuation　of　the　blue　LED　with　CBL　under　700mA　and　900mA　working　current　was　5%　and　1.76%　smaller　than　that　of　the　blue　LED　without　CBL　structure.　The　LED　with　CBL　structure　has　slower　attenuation　and　better　device　performance.　The　forward　voltage　of　the　device　increases　with　the　increase　of　the　aging　time.　The　reason　is　that　the　ohmic　contact　resistance　of　the　p-type　layer　increases　due　to　the　influence　of　large　current　and　higher　junction　temperature,　and　the　degradation　of　the　packaging　material　also　causes　the　series　resistance　to　increase.　Finally,　the　actual　life　of　the　device　when　it　meets　the　L50　standard　under　normal　current　is　deduced　according　to　the　inverse　power　law　model.　LEDs　with　or　without　CBL　structure　are　93555h　and　40881h,　respectively.　LEDs　with　CBL　structure　have　longer　life　and　higher　reliability.　©　2020　IEEE.