The　optimal　proton　adsorption　design　of　non-noble　metal　based　catalysts　is　critical　to　the　realization　of　efficient　hydrogen　evolution　reactions　(HER)　in　acidic　media,　but　it　is　also　challenging.　Herein,　sulfur　anion-assisted　completely　reconfigured　MnOx　(R-S-MnOx-CC)　with　self-supported　nanostructure　was　prepared　on　carbon　cloth　by　in　situ　phase　transformation　method.　The　reconfiguration　process　results　in　spinel-structured　Mn3O4　which　can　enhance　charge　transport　and　expose　more　active　sites　through　charge　disproportionation.　The　theoretical　calculation　indicates　that　the　reconfiguration　can　increase　the　electron　state　density　of　the　Mn　d　band　near　the　Fermi　level,　promote　the　right　shift　of　the　d-band　center,　enhance　the　electron　transport　capacity　of　the　catalyst　to　achieve　the　optimal　H+　adsorption.　The　R-S-MnOx-CC　catalyst　has　excellent　acidic　HER　performance　with　an　overpotential　of　only　43　mV　and　234　mV　at　10　mA　cm(-2)　and　400　mA　cm(-2),　respectively,　a　low　charge　transfer　resistance　Rct　(0.29　Omega)　and　stably　maintained　for　100　h　without　decay　(similar　to　300　mA　cm(-2)).　This　strategy　provides　a　feasible　way　to　design　efficient　and　stable　non-noble　metal-based　electrocatalysts　for　the　HER　industrialization　of　proton　exchange　membrane　(PEM)　water　electrolyzers.