Method for rapidly preparing Prussian blue or analogues thereof in batches and application of Prussian blue or analogues thereof

The invention relates to the technical field of preparation of inorganic nanopowder, and particularly provides a method for rapidly preparing Prussian blue or analogues thereof in batches and application of the Prussian blue or the analogues thereof. The preparation method comprises the following steps: preparing an aqueous solution of metal salt, wherein the metal salt is one or a mixture of more selected from ferric salt, cobalt salt and nickel salt, adding trisodium citrate, and conducting stirring at a room temperature to obtain a solution I; preparing an aqueous solution of a cyanogen-containing complex, conducting stirring at room temperature, and dropwise adding the aqueous solution of the cyanogen-containing complex into the solution I to obtain a solution II; and subjecting the solution II to stirring and reacting, centrifuging a reaction solution, collecting solids, and performing washing, and drying in vacuum to obtain one selected from iron-based prussian blue, ferro-nickel prussian blue, nickel-b