In　the　search　for　high-temperature　superconductivity　in　hydrides,　a　plethora　of　multi-hydrogen　superconductors　have　been　theoretically　predicted,　and　some　have　been　synthesized　experimentally　under　ultrahigh　pressures　of　several　hundred　GPa.　However,　the　impracticality　of　these　high-pressure　methods　has　been　a　persistent　issue.　In　response,　we　propose　a　new　approach　to　achieve　high-temperature　superconductivity　under　ambient　pressure　by　implanting　hydrogen　into　lead　to　create　a　stable　few-hydrogen　binary　perovskite,　Pb4H.　This　approach　diverges　from　the　popular　design　methodology　of　multi-hydrogen　covalent　high　critical　temperature　(Tc)　superconductors　under　ultrahigh　pressure.　By　solving　the　anisotropic　Migdal-Eliashberg　equations,　we　demonstrate　that　perovskite　Pb4H　presents　a　phonon-mediated　superconductivity　exceeding　46　K　with　inclusion　of　spin-orbit　coupling,　which　is　six　times　higher　than　that　of　bulk　Pb　(7.22　K)　and　comparable　to　that　of　MgB2,　the　highest　Tc　achieved　experimentally　at　ambient　pressure　under　the　Bardeen,　Cooper,　and　Schrieffer　framework.　The　high　Tc　can　be　attributed　to　the　strong　electron-phonon　coupling　strength　of　2.45,　which　arises　from　hydrogen　implantation　in　lead　that　induces　several　high-frequency　optical　phonon　modes　with　a　relatively　large　phonon　linewidth　resulting　from　H　atom　vibration.　The　metallic-bonding　in　perovskite　Pb4H　not　only　improves　the　structural　stability　but　also　guarantees　better　ductility　than　the　widely　investigated　multi-hydrogen,　iron-based　and　cuprate　superconductors.　These　results　suggest　that　there　is　potential　for　the　exploration　of　new　high-temperature　superconductors　under　ambient　pressure　and　may　reignite　interest　in　their　experimental　synthesis　in　the　near　future.　©　2024　IOP　Publishing　Ltd.