Micro-LED　is　one　of　the　most　promising　display　devices,　which　has　Micron-sized　inorganic　structure.　The　miniaturized　size　of　Micro-LED　leads　to　a　large　amount　of　sidewall　emission,　which　causes　crosstalk　for　display　devices.　To　solve　the　problem,　this　paper　proposes　a　novel　Micro-LED　structure　by　designing　a　sidewall　light　guide　structure　where　SiO2　and　TiO2　layers　are　successively　added　to　the　Micro-LED’s　sidewall　to　form　a　total　reflection　layer.　Thereby,　large　part　of　the　light　emitting　from　sidewall　can　be　guided　to　the　front　of　this　structure.　The　simulation　results　show　that　RGB　Micro-LEDs　with　the　sidewall　light　guide　structure　can　improve　the　efficiency　of　front　emission　in　the　range　of　sidewall　inclination　degree　from　0°　to　50°.　Further,　the　ratio　of　front　emission　to　the　total　emission　can　be　improved　to　68%.　©　2023,　John　Wiley　and　Sons　Inc.　All　rights　reserved.