Abstract: According to the problems existing in current process for extracting vanadium, the screening classification of a low-grade vanadium ore were investigated, and the acid leaching process for vanadium extraction from the vanadium ore concentrated for tailing discarding was researched based on the mineralogy and physical dressing.The parameters in leaching process had been analyzed and optimized in experiments, and the suitable process conditions were determined including grinding fineness, the concentration of sulfuric acid, leaching temperature, liquid-solid ratio and leaching time.The leaching rate of vanadium can be over 90% under the optimum conditions.