Method for extracting vanadium from waste vanadium catalyst

The invention discloses a method for extracting vanadium from a waste vanadium catalyst. The method includes the following steps that trituration and water logging are carried out on the waste vanadium catalyst; after reduction and oxidation, a feed solution is obtained; the pH value of the feed solution is adjusted to 2.0-3.0; static adsorption and/or dynamic adsorption are/is carried out after mixing Dex-V anion exchange resin, load vanadium resin is obtained; a vanadium containing desorption solution is obtained by leaching the obtained load vanadium resin with a desorption solution; and after adjusting the pH value of the vanadium containing desorption solution to 8-9, ammonium chloride is added, precipitate is obtained, and vanadium pentoxide is obtained after calcining. According tothe method for extracting the vanadium from the waste vanadium catalyst, the process of purification-crude vanadium precipitating-alkali dissolution is saved, tens times enrichment of vanadium concentration is obtained, the t