The invention provides a monolene desulphurization adsorbent, a preparation method thereof, and an application thereof. Calculated according to the total weight of the adsorbent provided by the invention, the adsorbent at least comprises: (1) 1-20 wt% of SAPO molecular sieve; (2) 3-35 wt% of titanium dioxide; (3) 5-40 wt% of pillared clay; (4) 10-80 wt% of zinc oxide; and (5) 5-30 wt% of at least one metal promoter selected from cobalt, nickel, iron and manganese. The absorbent provided by the invention has high desulphurization activity, high wear resistance, and a substantial advantage of gasoline octane number increasing. The absorbent can be used in desulphurization processes of catalytic gasoline or diesel engine fuel.