The　specific　capacity　of　Li-rich　Mn-based　cathode　materials　(LRM)　can　be　enhanced　by　the　oxidation　of　lattice　oxygen　at　high　voltages.　Nevertheless,　an　irreversible　oxygen　loss　emerges　with　cycling,　triggering　interlocking　surface/interface　issues　and　thereby　the　fast　deterioration　of　cycling　performance.　Herein,　a　solid-liquid-gas　integrated　surface/interface　modification　method　is　presented　to　form　a　CEI　preconstruction　layer　and　defective　heterostructure　on　the　surface/interface　of　LRM　material　to　improve　its　cycling　stability　greatly.　The　CEI　preconstruction　layer　can　effectively　anchor　on　the　surface/interface　of　LRM　primary　and　secondary　particles　to　induce　a　thin　and　exceptionally　stable　CEI　layer　during　cycling,　and　then　mitigate　the　TM　dissolution　and　strengthen　the　stability　of　surface　lattice　oxygen.　The　introduced　defective　heterostructure　can　reduce　the　charge　transfer　resistance.　As　a　result,　the　designed　LRM　cathode　displays　a　high　reversible　capacity　of　315　mAh　g(-1　)at　0.1　C　as　well　as　high　capacity　retention　of　83.3%　at　1　C　after　500　cycles.　Outstanding　voltage　stability　with　a　retention　of　91.5%　is　achieved　at　5　C　after　500　cycles.　This　work　opens　an　attractive　path　in　manipulating　the　surface/interface　stability　of　LRM　to　enhance　its　cycling　performance　for　high-energy-density　Li-ion　batteries.