Abstract: In order to comprehensively recover molybdenum, sulfur, and copper from molybdenum removal residues from tungsten smelting, this paper proposes the idea of alkaline leaching molybdenum removal residues to separate copper and molybdenum, and oxidation of S^2- in the leaching solution to separate sulfur and molybdenum. This article investigates in detail the influence of sodium hydroxide dosage, temperature, reaction time, liquid-solid ratio and other process conditions on the molybdenum leaching rate and S^2-residual rate in the alkaline leaching process. The test results show that when the normal pressure alkaline leaching temperature is 85 ℃, the sodium hydroxide dosage is 1.1 times the theoretical amount, the reaction is 180 minutes, and the liquid-solid mass ratio is 3 GA6FA 1, the molybdenum leaching rate is 99.48%, and the copper leaching rate is less than 0.1% The S^2-residual rate is higher than 98%. When sulfuric acid and sodium chlorate are used as oxidants to oxidize the alkali leaching filtrate, the S^2-residual rate is lower than 0.2%. When high-pressure oxygen alkaline leaching is at a temperature of 85 ℃, the amount of sodium hydroxide is 1.1 times the theoretical amount, the reaction is 180 minutes, and the mass ratio of liquid to solid is 3 GA6FA 1, the molybdenum leaching rate is 99.82%, the copper leaching rate is less than 0.5%, and the S^2-residual rate As low as 0.35%; both processes can achieve deep separation of molybdenum from copper and sulfur, providing a practical solution for the comprehensive utilization of molybdenum removal sludge.