Abstract: The catalyst was made of zeolite as the active component with boehmite as the carrier. Its activity of olefins removal was tested and solid catalyst surface acidity was measured by pyridine FT-IR. The relation between its activity and its surface acid sites was also investigated, which shows that the activitywas affected not only by the amount of acid sites but also by the proportion between B acid sites and L acid sites. The activity of the catalyst was the best when the proportion between B acid sites and L acid sites was proper.