The study of the CO2 dehydrogenation catalyst deactivation shows that the sulfur is the main cause of leading CO2 dehydrogenation catalyst deactivation in the urea plant in w hich no matter what the raw material is the coal ,the natural gas or the residual oil . based on the examples of industrial application ,describe that after regeneration treatment of the deactivated sulfur‐poisoning T H‐3 dehydrogenation catalyst ,the catalyst restores to approaching to the fresh dehydrogenation catalyst activity ,and it completely could meet the industry requirements ,so the operating cost is saved .%对尿素装置失活CO2脱氢催化剂的研究表明，无论是以煤、天然气还是以渣油为原料的尿素厂，硫都是导致脱氢催化剂失活的主要原因。结合工业应用实例，介绍硫中毒失活的 TH‐3脱氢催化剂经过再生处理后，可恢复到接近新鲜脱氢催化剂的活性，完全能够满足工业生产的要求，从而节省装置的运行费用。
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