Abstract: The experiment presents the investigation of vanadium-bearing stone coal in hubei province，a comperative study was taken between sulfuric acid leaching and sulfuric acid leaching with leaching agent CX added. The experimental results show that the addition of leaching agent CX can effectively improve the leaching effect of the vanadium，shorten the reaction time for 2 h，reduce the dosage of H₂SO₄ and reaction temperature and the cost of reaction; In the case of the dosage of CX is 5% of raw ore quality，sulfuric acid concentration is 20%，and the leaching temperature at 90 ℃，leaching time for 4 h ，vanadium leaching rate can amount to 90%,which is 18.74% higher than the condition without the leaching agent.

Key words: Stone coal, Acid leaching, Leaching agent