Plasma　electrolytic　oxidation　(PEO)　is　a　promising　surface　treatment　method　to　improve　the　surface　properties　of　light　alloys.　However,　the　high　operating　voltages　led　to　significant　power　consumption　and　a　burden　on　the　grid,　which　limited　its　application.　In　this　work,　we　employ　a　relatively　low　voltage　(~100　V)　in　an　organic-inorganic　mixed　electrolyte　solution,　and　successfully　achieve　aa　low　energy　plasma　electrolysis　oxidation　(LEPEO)　coating,　enabling　the　reduction　of　the　energy　consumption　of　PEO　on　Mg-Li　alloy.　The　energy　consumption　per　unit　volume　(ECPUV)　of　the　LEPEO　process　is　8.3　kJ.(dm(2).mu　m)(-1),　which　is　approximate　57.0%　energy　consumption　savings　compared　with　the　PEO　process　(19.3　kJ.(dm(2).mu　m)(-1),　NaOH-Na2SiO3　electrolyte).　Results　show　no　remarkable　difference　between　the　two　coatings　in　terms　of　morphologies,　thickness,　element　type　and　distribution.　The　fracture　process　and　corrosion　protection　performance　of　the　coatings　were　evaluated　by　in-situ　SEM　tensile　test　and　electrochemical　impedance　spectroscopy　(EIS).　The　LEPEO　coating　only　consists　of　MgO　and　amorphous　SiOx,　showing　higher　tensile　strength,　deformation　displacement　and　better　corrosion　resistance　compared　with　the　PEO　coating.　The　improved　surface　properties　and　lower　energy　consumption　of　LEPEO　coatings　will　facilitate　the　application　and　development　of　PEO　technology.