Manganese-based　cathode　materials　have　garnered　extensive　interest　because　of　their　high　capacity,　superior　energy　density,　and　tunable　crystal　structures.　Despite　their　cost-effectiveness,　challenges　like　Mn　dissolution　and　gas　evolution　originating　from　the　irreversible　structural　degradation　pose　risks　to　stability　and　prolonged　electrochemical　behaviors,　ultimately　constraining　their　practical　applications　and　market　prospects.　While　the　material　characteristics　and　redox　mechanisms　of　Mn-based　cathodes　are　extensively　investigated,　a　systematic　iterative　approach　to　material　design　that　balances　performance　and　application　demands　remains　both　necessary　and　urgent.　Recent　strategies　for　enhancing　cathode　performances　emphasize　the　innovative　introduction　and　customization　of　composite　structures　in　Mn-based　cathode　materials　to　address　the　challenges　above.　This　review　aims　to　provide　a　comprehensive　understanding　of　composite-structure　construction　methodologies　and　offers　practical　guidelines　for　effectively　designing　high-stability　Mn-based　composite-structure　cathode　materials.　This　encompasses　the　classifications　of　composite　scales,　the　discussions　for　the　extent　of　composite-structure　construction　inside　and　outside　of　the　cathode　grains,　and　an　exploration　of　the　development　potential　of　these　materials,　especially　for　grid-scale　applications.