Polyoxovanadate efficient cleaning and purification method

The invention relates to a polyoxovanadate washing technology, in particular to a polyoxovanadate efficient cleaning and purification method. The polyoxovanadate efficient cleaning and purification method comprises the following steps that a, polyoxovanadate slurry is subjected to suction filtration, and weakly-agglomerated polyoxovanadate with the water content being 30-40 wt% is obtained; b, a solvent is added for pulping and soaking, and slurry with the temperature larger than or equal to 85 DEG C is obtained, wherein the solid-to-liquid ratio of the weakly-agglomerated vanadate with the water content being 30-40 wt% to the solvent is 1:2-3 Kg/L; the solvent is one of water or soluble sulfate; c, the slurry obtained in the step b is subjected to filter pressing, and polyoxovanadate is obtained. The method has the advantages that impurities are excellent in solid-phase and liquid-phase diffusion distribution dynamic condition, impurity elements are repeatedly and sufficiently distributed into the liquid pha