Micro-scale　light　emitting　diode　(mu　LED)　reduces　the　front　self-luminous　display　area　by　orders　of　magnitude,　which　brings　the　increase　of　sidewall　emission　and　the　resulting　crosstalk　between　adjacent　sub-pixels　of　displays.　Reflector　coating　on　the　mu　LED＇s　sidewall　is　effective　for　the　collection　and　utilization　of　side　emission　light.　However,　the　existing　multilayer　periodic　dielectric　mirrors　are　undesirable　for　all　angular　reflection.　In　this　paper,　an　omni-directional　reflector　(ODR)　is　designed　for　the　mu　LED　display　pixel　to　effectively　utilize　light　leakage　from　the　sidewall　emission　and　improve　the　total　light　extraction　efficiency　(LEE).　The　designed　ODR　is　insensitive　to　the　angular　distribution　of　the　incident　light,　and　has　the　capability　to　reflect　the　light　reaching　the　mu　LED＇s　sidewall　into　the　escape　cone　for　front　emission.　By　introducing　the　two-dimensional　finite-difference　time-domain　method,　the　mu　LED　laminated　structure　is　established　to　analyze　the　sidewall　emission　with　an　optimal　inclination　angle.　By　introducing　the　ODR　for　the　inclined　mu　LED　pixel,　the　overall　LEE　can　be　increased　by　2.24　times　and　the　sidewall　emission　is　reduced　by　99.6%　compared　with　conventional　vertical　mu　LEDs.　Simulation　and　experimental　results　are　in　good　agreement.　The　proposed　ODR　is　expected　to　achieve　the　increase　of　LEE　and　sidewall-emission-free　mu　LED　displays.