Abstract: The general situation of a sulfur recovery and tail gas treatment unit in carbon disulfide industry is introduced. The composition of process gas at the beginning of operation is analyzed, and then the data about organic sulfur hydrolysis and gas composition after hydrogenation is obtained. The reasons of higher hydrogen consumption, larger pressure difference and pH value reduction of chilled water are discussed. Combined with catalyst evaluation, corresponding suggestions are proposed. The hydrogenation section of unit runs well after hydrogenation catalyst resulfurized. The results of industrial application show that the combination of CT6-11 low temperature tail gas hydrogenation catalyst and CT6-8 Ti-based catalyst has been applied successfully, which can be applied to similar devices.