Abstract: Cyclodextrins are water-soluble hosts that contain a hydrophobic cavity which is able to accommodate a variety of suitable guest molecules.Inclusion in these hosts results in many modifications to the properties of the guest compounds.So they are widely used in medicine,pesticide,food and other fields.Cyclodextrins,molecular inclusion technique,preparation and characterization of cyclodextrin inclusion complex and application in many fields of cyclodextrin closure technology were reviewed,along with a detailed discussion of the application of cyclodextrin closure technology in pesticide formulation processing,development trends and prospects for future were also discussed.