Method for deeply separating molybdenum and vanadium in solution containing molybdenum and vanadium

The invention relates to a method for deeply separating molybdenum and vanadium in a solution containing the molybdenum and the vanadium. The method includes: regulating the acidity [H] of the solution containing the molybdenum and the vanadium to be 0.0003-10mol/L, and then using the compound of Mo(IV) or/and Mo(V) as the reducing agent to selectively reduce the vanadium in the solution to obtain liquid after reduction; regulating the pH of the liquid after reduction to be 4-7, settling the vanadium, and using an ion exchanging method or extraction method to enrich the molybdenum; or regulating the pH of the liquid after reduction to be 2-4, using an ion exchanging method or extraction method to enrich the molybdenum, then regulating the pH to 4-7, and settling the vanadium. The method has the advantages that the E Mo(VI)/Mo(V) and E V(V)/V(IV) potential differences under an acidic condition are utilized, the compound of Mo(IV) or/and Mo(V) as the reducing agent to selectively reduce the V(V) in the solut