Abstract: The effects of types and addition amount of slagging agent on the recovery rate of vanadium（V） and qualification rate of products during vanadium aluminum alloy（V-Al alloy） preparation by electro-aluminothermic process were studied.The results show that during the selected agents of calcium vanadate,mixture of calcium fluoride and calcium oxide and single calcium fluoride,the calcium vanadate has the most significant influence on the vanadium recovery with 88.4% of V recovery rate,while the single calcium fluoride exhibits the minimum effect with 87.4% of V recovery rate.Adding 10% of the slagging agent,a maximum qualification rate of 86% for V-Al alloy can be obtained.The defects of V-Al alloy,such as oxidation film,solidification shrinkage cavity and crystal phase segregation can be reduced by the slagging agents,which is beneficial for improvement of the qualification rate of the products.