Developing　efficient　and　stable　electrocatalyst　to　hydrogen　evolution　reaction　adaptable　for　electrolytes　with　different　pH　is　a　big　challenge.　In　this　work,　a　hierarchically　structured　ternary　nanohybrid　composed　of　flower-like　Ru　nanoparticles,　rigid　macrocyclic　cucurbit[6]uril　(CB[6])　and　carboxylated　multi-walled　carbon　nanotubes　(MWCNTs)　was　successfully　prepared　by　chemical　wet　method.　Benefited　by　the　structural　merits　of　flower-like　Ru　nanoparticles　exposed　abundant　active　sites　supported　by　the　MWCNTs　holding　superior　mass　transport　and　electrons　transfer　ability　as　well　as　the　existence　of　CB[6],　the　obtained　catalyst　exhibited　outstanding　HER　activities　with　overpotentials　of　27,　37　and　70　mV　at　−10　mA/cm2　in　alkaline,　acidic,　and　neutral　electrolytes,　respectively.　Under　the　same　electrocatalytic　operation　conditions,　the　HER　performance　is　comparable　or　superior　to　commercial　Pt/C　catalyst　(47,　27　and　49　mV).　Besides,　chronopotentiometric　and　accelerated　stability　test　also　revealed　its　extraordinary　stability,　which　could　be　further　employed　for　electrocatalytic　procedure　in　a　broad　pH　range.　©　2023