NOVELTY - The battery has a negative current collector provided with a negative electrode lead terminal and fixed with a seal gasket. A negative pole slurry tank is fixed with an end surface of a guide groove through an end of a cathode sizing agent conveying pipe. Another end surface of the guide groove is fixed with a positive pole slurry tank. A positive current collector is provided with a positive electrode lead terminal. The positive pole slurry tank is filled with mixing carbon material, catalyst-lithium salt, organic liquid mixing electrolyte and high pure saturation oxygen.    USE - Magnesium ion liquid flow battery.    ADVANTAGE - The battery avoids negative electrode surface and positive surface corrosion of an oxide film so as to avoid battery degradation performance. The battery is convenient to charge and discharge, and has better re-charging effect.    DETAILED DESCRIPTION - The negative current collector and the positive current collector are made of graphite or stainless steel material. The negative pole slurry tank is filled with magnesium containing salt such as magnesium oxide, magnesium fluoride, magnesium chlorate, magnesium diboride and magnesium sulfate material and organic solvent such as EC, polycarbonate, dimethyl carbonate, diethylene glycol, ethyl methyl carbonafte, dimethoxyethane, dioxide cyclopentane and diethylene material. The mixing carbon material is selected from metal, metal alloy, metal oxide, selenide, metal nitride, metal composite oxide, transition metal macro-cyclic compound material, active carbon, foam carbon, graphite powder, middle phase carbon, carbon nano tube, carbon fiber, fullerene and graphene material. The negative current collector is fixed with a polymer composite film that is made of high molecular material such as polypropylene, polyethylene, polyimide, polyaryletherketones, polynorbornene or PTFE material and inorganic composite material such as glass fiber, silicon oxide, aluminum oxide, titanium oxide, magnesium oxide, aluminum lithium or lithium titanate material. The cathode sizing agent conveying pipes and anode sizing agent conveying pipe are made of stainless steel, silicon glue or PTFE material. The negative pole slurry tank and the positive pole slurry tank are made of stainless steel or PTFE material.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of a magnesium ion liquid flow battery.