The　water　oxidation　is　a　promising　method　for　generating　the　renewable　energy.　However,　the　high　catalytic　performance　using　stable　electrocatalysts　in　alkali　solutions　remains　limited.　In　this　work,　we　herein　report　a　facile　method　of　deposition　of　NiAl-LDH　electrocatalyst　that　addresses　the　above　challenge　under　a　magnetic　field.　Water　oxidation　behavior　of　the　new　electrodeposited　nickel-aluminum　layered　double　hydroxides　(NiAlLDH)　on　Ni　electroplated　on　the　Cu　substrate　and　their　remarkable　improvements　in　electrocatalytic　activity　under　the　external　magnetic　fields　in　alkali　solutions　were　studied.　Ni　films　were　first　electroplated　on　the　Cu　substrate　using　the　direct　current　(DC)　method.　NiAl-LDH　was　coated　on　the　Ni/Cu　substrates　using　the　electrochemical　deposition　method,　and　their　water　oxidation　performance　was　investigated　in　the　KOH　aqueous　solution　(0.1　mol　center　dot　L-1)　at　25　degrees　C　in　the　absence　and　presence　of　magnetic　field.　It　was　found　that　the　oxygen　evolution　reaction　(OER)　over　NiAl-LDH/Ni/Cu　was　improved　when　water　oxidation　was　conducted　under　a　magnetic　field　(mu　oH　perpendicular　to　=　0.2　T)　by　decreasing　the　onset　potential,　Tafel　slope,　and　overpotential　or　by　increasing　the　current　density　(about　54　mA　center　dot　cm-　2).　The　effects　were　even　more　pronounced　when　the　magnetic　field　was　applied　perpendicular　to　the　electrode　plane,　reaching　the　OER　overpotential　of　about　310　mV　and　the　Tafel　slop　of　about　142　mV　center　dot　dec-　1.　We　interpreted　the　effect　of　magnetic　water　electrolysis　by　the　ordinary　magnetohydrodynamics　(MHD)　which　enhanced　the　mass　transport,　increased　the　limiting　current　density,　and　removed　the　blocking　oxygen　gas　bubbles　accumulated　on　the　electrode　surface.　The　present　investigation　provides　a　low-cost　electrocatalyst　system　for　efficient　electrochemical　water　oxidation.