We　demonstrate　here　that　two-dimensional　boron　nitride　(h-BN)　nanosheets　can　be　employed　as　a　robust　supporting　substrate　to　incorporate　function　metal　oxides.　The　Cu2O@h-BN　composites　are　thus　obtained　by　dispersing　Cu2O　octahedrons　on　the　surfaces　of　h-BN　nanosheets.　The　-OH　and　-NH　groups　on　the　surfaces　of　h-BN　nanosheets　are　found　to　be　beneficial　for　anchoring　Cu2O　octahedrons.　Moreover,　the　Cu2O@h-BN　composites　exhibit　superior　activity　for　the　reduction　of　p-nitrophenol　to　pure　Cu2O　crystals　and　h-BN　nanosheets.　The　h-BN　component　in　the　composites　plays　a　critical　role　in　the　formation　and　adsorbing　of　the　p-nitrophenolate　ions,　and,　at　the　same　time,　Cu2O　components　react　with　brohydride　ions　and　transfer　a　surface　hydrogen　species　and　electrons,　resulting　in　the　reduction　of　p-nitrophenol　into　p-aminophenol.　Our　results　provide　a　new　approach　for　the　rational　design　and　development　of　metal　oxides　composites　and　open　the　way　to　a　range　of　important　applications　of　h-BN-based　materials.