A method of improving selectivity of a selective hydrodesulfurization catalyst

A method of improving selectivity of a selective hydrodesulfurization catalyst is provided. A catalyst selectivity regulating step is provided additionally between a sulfidation step and a normal production step. The catalyst selectivity regulating step is a step in which a regulating raw material and the selective hydrodesulfurization catalyst are brought into contact for 24-70 h in a regulating gas atmosphere under regulating reaction conditions. By the method, selectivity of the selective hydrodesulfurization catalyst can be improved. Compared with the prior art, in a situation that the sulfur contents of gasoline products are same, the olefin saturation factor of a product prepared by the method is lower and the octane number loss of a product prepared by the method is lower. 种提高选择性加氢脱硫催化剂选择性的方法，在硫化过程和正常生产过程之间增加催化剂选择性调控过程，所述的催化剂选择性调控过程是指调控原料在调控气体的气氛中、在调控反应条件下与选择性加氢脱硫催化剂接触24-70小时。采用本发明提供的方法，可以提高选择性加氢脱硫催化剂的选择性。与现有技术相比，在汽油产品硫含量相同的情况下，烯烃饱和率更低，产品辛烷值损失更小。