Abstract: Sequence stratigraphy is used for analytical comparison of the sequence-system tracts in Cretaceous and Jurassic strata of Yakenbei area in Kuqa depression.The reservoircaprock assemblage among the sequence-system tracts and its allocation system was established to predict the distribution of favorable reservoir sandstones.The study of the relationship between the depositional system tracts and the reservoir distribution indicate the sand bodies in fan deltafront subaqueous distributary channel and mouth bar of the transgressive systems tracts are favorable reservoir sand bodies,the sand body in fan delta-front subaqueous distributary channel of the low stand systems tracts is secondary favorable reservoir sand body.