Abstract: This paper analyzed the cause of high impurities in ammonium metavanadate products at the aspect of the production process and selection of process control parameters.To control the content of impurities in AMV,the change trend of the impurity content after filtering,adjustment of the impurity removal coefficient and the selection of ammonium salt in basic precipitation were investigated in different temperature conditions.In the technological process of preparing ammonium polyvanadate(APV) by low ammonium salt precipitation,return dissolving the APV to remove the impurity,and then precipitating AMV in basic condition,the impurities in AMV could be reduced from 0.05% to 0.02% effectively,which was of important guiding significance on the improvement of high purity vanadium production technology,and laid a foundation to develop new products for Vanadium industry Co.,Ltd.,Pangang group.