NOVELTY - An alkali metal liquid flow battery has an anode current collector, a negative electrode, positive electrode slurry, a cathode electrolyte, a separation film, an encapsulation shell, a positive electrode slurry storage tank, and a cathode electrolyte storage tank. The separation film is positioned between the anode current collector and the negative electrode. The positive electrode slurry comprises a positive electrode active material, a conductive agent, and an anode electrolyte. The negative electrode is an alkali metal electrode.    USE - Alkali metal liquid flow battery for large-scale electricity storage in solar power generation or wind power generation (claimed).    DETAILED DESCRIPTION - An alkali metal liquid flow battery has an anode current collector, a negative electrode, positive electrode slurry, a cathode electrolyte, a separation film, an encapsulation shell, a positive electrode slurry storage tank, and a cathode electrolyte storage tank. The anode current collector, the negative electrode, the separation film, part of the positive electrode slurry, and part of the negative electrode electrolyte are accommodated in the encapsulation shell. The separation film is positioned between the anode current collector and the negative electrode, and separates the positive electrode slurry and the cathode electrolyte. The positive electrode slurry comprises a positive electrode active material, a conductive agent, and an anode electrolyte. The negative electrode is an alkali metal electrode. An INDEPENDENT CLAIM is also included for a method for preparing an alkali metal liquid flow battery, which involves uniformly mixing a positive electrode active material, a positive electrode electrolyte and conductive agent to prepare a semi-solid mixture form of positive electrode slurry, placing the positive electrode slurry into positive electrode slurry storage tank and a cathode electrolyte into the cathode electrolyte storage tank, installing a separator on a package housing, locating a diaphragm between the positive electrode current collector and a negative electrode, and introducing the positive electrode slurry and cathode electrolyte respectively into the package shell of the positive electrode current collector and a negative electrode side.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of an alkali metal liquid flow battery. '(Drawing includes non-English language text)'