The　cone-shaped　hollow　flexible　reinforced　concrete　foundation　(CHFRF)　is　an　innovative　type　of　mountain　wind　turbine　foundation,　which　outperforms　the　regular　mountain　wind　turbine　foundation　in　reducing　the　steel　and　concrete　and　protecting　the　surrounding　vegetation　for　the　cavity　absorbs　soil　obtained　from　excavating　the　foundation　pit.　Moreover,　the　rubber　layer　installed　between　the　wall　of　CHFRF　and　the　surrounding　ground　increases　foundation　flexibility　and　releases　the　larger　overturning　moment　induced　by　wind.　The　rubber　layer　is　made　of　alternately　laminated　rubber　and　steel.　The　objectives　of　this　research　are　to　study　the　lateral　bearing　behaviors　of　the　CHFRF　under　monotonic　and　cyclic　lateral　loading　in　sand　by　model　tests　and　FEM　simulations.　The　results　reveal　that　the　CHFRF　rotates　during　loading;　and,　in　the　ultimate　state,　the　rotation　center　is　located　at　a　depth　of　approximately　0.6-0.65　times　the　foundation　height　and　is　0.15-0.18　times　the　diameter　of　the　foundation　away　from　its　centerline　as　well.　The　lateral　bearing　capacity　of　the　CHFRF　improves　with　the　increase　of　embedded　depth　and　vertical　load　applied　to　the　foundation.　Moreover,　compared　to　the　CHFRF　without　the　rubber　layer,　the　rubber　layer　can　reduce　the　earth　pressure　along　the　wall　of　CHFRF　by　22%　and　decrease　the　deformed　range　of　the　soil　surrounding　the　foundation,　revealing　that　it　can　reduce　the　loads　transferred　to　the　surrounding　soil　for　extending　the　service　life　of　the　foundation.　However,　the　thickness　and　stiffness　of　the　rubber　layer　are　important　factors　influencing　the　lateral　bearing　capacity　and　the　energy　dissipation　of　the　foundation.　Moreover,　it　should　be　noted　that　the　energy　dissipation　mainly　comes　from　the　steel　of　the　rubber　layer　rather　than　rubber.