QSJ-04 hydrolyzer is an organic sulfur conversion catalyst prepared with Al₂O₃-TiO2 as a composite carrier and an anti-hydration additive. It is suitable for the process of preparing conversion process gas with coal, heavy oil and residual oil as raw materials, especially for the conversion of organic sulfur compounds such as COS and CS2 in process gas with high pressure, high water/gas and high CO concentration, and converts the difficult-to-remove organic sulfides into easy-to-remove inorganic sulfides so that they can be completely removed in the subsequent process.