Aqueous　Zn-ion　batteries　(ZIBs),　a　new　green　energy　storage　system,　have　enormous　development　potential　among　various　aqueous　batteries　due　to　the　superiorities　of　good　environmental　friendliness,　low　production　costs,　high　operational　safety,　high　theoretical　capacity,　and　excellent　rate　performance.　Compared　with　traditional　cathode　materials　like　manganese　oxides　and　vanadium　oxides,　Prussian　blue　analogues　(PBAs)　with　a　firm　3D　framework　and　large　ion　channels　are　more　suitable　for　zinc　ions　insertion/extraction.　Here,　environmentally　friendly　sodium　manganese　hexacyanoferrate　(NaMnHCF)　is　applied　to　aqueous　ZIBs,　and　its　excellent　electrochemical　performance　is　characterized　by　varieties　of　analytical　techniques.　The　charge/discharge　profiles　display　a　rather　flat　operating　platform　with　extremely　small　redox　polarization　(less　than　0.05　V).　Under　the　current　density　of　50　mA　g−1,　NaMnHCF　can　attain　an　initial　charged　specific　capacity　of　55.3　mAh　g−1.　Meanwhile,　it　also　exhibits　a　superior　electrochemical　rate　performance.　Furthermore,　the　mechanism　of　zinc　ions　insertion/extraction　in　the　NaMnHCF　frameworks　is　revealed　through　a　deep　exploration　of　the　relationship　between　element　states,　storage　kinetics,　crystal　structure,　and　electrochemical　properties.　From　a　practical　standpoint,　the　environmentally　friendly　NaMnHCF　exhibits　favorable　rate　capability　and　cycling　stability,　which　makes　it　be　a　perfect　choice　for　aqueous　ZIBs　of　the　application　in　the　green　new　energy　industry.　©　2020　Elsevier　B.V.