Abstract: Through making full use of the data obtained from field geologic investigation，deeply analyzing reflecting characteristics of the bottom of Paleogene，and logically selecting tectonic theories of orogeny，structural model of Kedong structural belt is set up.The Kedong structure is characterized by “hinder basementinvolved structure and front caprock detachment structure”，and includes the following structural styles：basementinvlolved thrust structure，faultbend fold，triangle zone structure and passive roof recoiled fault.Regional geological data and growth strata show that Kedong structure developed in Late Pliocene and finalized after Early Pleistocene.The results are obtained from structurestratigraphy balance restoration of the inline geological section that structural shorten ratio of Kedong structure in Quaternary is 367％ and structural shorten rate is about 752 mm/a.Tarim oilfield company drilled Kedong 1 on June 14， 2009 based on the structural model and high commercial hydrocarbon flow is obtained on April 4，2010，which is significant to the exploration in the southwestern Tarim Basin.