Based　on　the　micro　cavity　theory　and　the　film　optical　transmission　matrix　model,　the　resonant　cavity　light　emitting　diodes　with　different　aperturehave　been　designed　and　fabricated.　Through　the　design　of　epitaxial　structure　as　well　as　the　preparation　and　testing　of　devices,　in　this　paper,　the　effects　of　microcavity　structure,　cavity　spectrum　detuning　and　effective　radiation　area　on　the　luminous　efficiency,　peak　wavelength　and　full　width　of　the　half　wave　were　investigated　in　detail.　In　the　end,　the　bright　current　of　the　device　is　reduced　and　the　external　quantum　efficiency　of　the　device　is　improved.　The　device　can　produce　visible　light　intensity　at　the　100　μA　bias　current.　At　1mA　current,　the　power　is　0.16　mW　and　the　external　quantum　efficiency　is　7%.　The　peak　wavelength　of　the　device　is　650　nm,　which　had　not　changed　with　the　current　in　the　range　of　0.1~7　mA.　The　far-field　distribution　is　circular　spot　with　uniform　symmetry,　and　the　horizontal　and　vertical　divergence　angles　are　46°　and　48°　respectively.　Compared　with　ordinary　light　emitting　diode,　the　device　has　higher　luminous　efficiency　and　better　monochromaticity,　directivity,　wavelength　stability.　This　research　has　provided　devices　for　realizing　high　current　luminescent　driven　by　micro　current,　and　provided　references　for　the　research　of　the　photoelectric　characteristics　of　resonant　cavity　light　emitting　diodes　under　micro　current.　©　2018,　Science　Press.　All　right　reserved.