High-capacity　Li-rich　layered　oxides　(LLOs)　suffer　from　severe　structure　degradation　due　to　the　utilization　of　hybrid　anion-　and　cation-redox　activity.　The　native　post-cycled　structure,　composed　of　progressively　densified　defective　spinel　layer　(DSL)　and　intrinsic　cations　mixing,　is　deemed　as　the　hindrance　of　the　rapid　and　reversible　de/intercalation　of　Li+.　Herein,　the　artificial　post-cycled　structure　consisting　of　artificial　DSL　and　inner　cations　mixing　is　in　situ　constructed,　which　would　act　as　a　shield　against　the　irreversible　oxygen　emission　and　undesirable　transition　metal　migration　by　suppressing　anion　redox　activity　and　modulating　cation　mixing.　Eventually,　the　modified　DSL-2%　Li-rich　cathode　demonstrates　remarkable　electrochemical　properties　with　a　high　discharge　capacity　of　187　mAh　g(-1)　after　500　cycles　at　2　C,　and　improved　voltage　stability.　Even　under　harsh　operating　conditions　of　50　&　DEG;C,　DSL-2%　can　provide　a　high　discharge　capacity　of　168　mAh　g(-1)　after　250　cycles　at　2　C,　which　is　much　higher　than　that　of　pristine　LLO　(92　mAh　g(-1)).　Furthermore,　the　artificial　post-cycled　structure　provides　a　novel　perspective　on　the　role　of　native　post-cycled　structure　in　sustaining　the　lattice　structure　of　the　lithium-depleted　region　and　also　provides　an　insightful　universal　design　principle　for　highly　stable　intercalated　materials　with　anionic　redox　activity.