The invention belongs to the field of hydrometallurgy, and particularly relates to a hydrolytic precipitation method of a vanadium-containing solution. The hydrolytic precipitation method of the vanadium-containing solution comprises the steps of a, reaction tube pretreatment; b, vanadium-containing solution pretreatment; c, vanadium-containing solution filtration and precipitation. In the step a, a tube made of an acid-resistant material is adopted and is filled with vanadium pentoxide. In the step b, the vanadium-containing solution to be treated is heated to 95-100 DEG C, and the pH of the vanadium-containing solution is regulated. In the step c, the pretreated vanadium-containing solution reversely flows through the reaction tube treated in the step a from bottom to top, the lower half part of the reaction tube is heated, the upper half part of the reaction tube is cooled, and therefore vanadium pentoxide crystals are obtained. According to the hydrolytic precipitation method of the vanadium-containing solution, through the effective measures of increasing the filtration pressure, pre-adding seed crystals, setting different temperature zones and the like, vanadium precipitation and ammonium poly-vanadate filtration are carried out at the same time, and obtained vanadium pentoxide particles are uniform in size.