Ordos basin is a large multicycle superimposed basin,developed on the basement of crystalline basement from Archean to early Proterozoic.The course of evolution develop steadily,at the same time develop with activity.In the paper,according to drilling and seism datum,recover ancient tectonic configuration,combine with sedimentary characteristic,plot out evolution phases of basin.Its development suffered four periods,aulacogen basin developed on middle-late Proterozoic,Karton basin developed on Paleozoic.