Micro　light-emitting　diodes　(Micro-LEDs)　are　regarded　as　the　core　of　next-generation　display　technology　due　to　their　high　brightness　and　energy　efficiency.　However,　the　reduction　in　the　size　of　Micro-LEDs　has　led　to　increased　manufacturing　challenges　and　exacerbated　issues　such　as　sidewall　emission,　which　hinder　the　development　of　high-pixel-density　displays.　This　paper　proposes　a　vertically　stacked　Micro-LED　design　based　on　an　L-shaped　metal　wall　structure,　aiming　to　suppress　sidewall　emission　and　enhance　top　light　extraction　efficiency　(LEE).　Through　parameter　scanning,　the　dimensions　of　the　Micro-LED　and　the　thickness　of　the　epitaxial　layer　are　optimized.　Combined　with　inclined　sidewalls　and　the　reflective　structure　of　the　L-shaped　metal　wall,　the　optical　characteristics　of　red,　green,　and　blue　Micro-LEDs　are　analyzed　using　ray-tracing　simulations.　The　sidewall　emission　is　significantly　reduced　(with　a　maximum　reduction　of　68.04%　compared　to　vertically　stacked　Micro-LEDs　without　metal　walls),　and　top　light　emission　is　enhanced　(the　LEE　within　+/-　90　degrees　direction　for　blue,　green,　and　red　light　increased　by　196.18%,　51.69%,　and　3.45%,　respectively,　compared　to　stacked　Micro-LEDs　without　metal　walls).　The　simulation　results　demonstrate　the　potential　of　the　L-shaped　metal　wall　in　vertically　stacked　full-color　Micro-LED　displays,　providing　a　new　approach　to　suppressing　optical　crosstalk　and　improving　display　performance.