The formation of the North China Craton (NCC) was resulted from the collision of the Western and Eastern blocks along the TransNorth China Orogen at ~1.85 Ga. Then the NCC experienced intracontinental extension during Meso to Neoproterozoic, which resulted in the formation of the Xiong'er rift, Yanliao rift, Zhaertai—Bayan Obo—Huade rift and Eastern margin rift. According to analysis of drilling data and strata correlation, some researchers suggested that Mesoproterozoic Changcheng—Jixian systems developed in the Ordos block. The Changcheng System is composed of quartz interlayered with slate in the lower part and silty slate, silicon slate, chert bend bearing dolomitic limestone, quartz sandstone in the upper part. The Jixian System is dominated by dolomite, and interlayered with sandstone and shale stone. Detrital zircon dating of the Changcheng System from 6 drillings has been carried out by this paper. The detrital zircons of the sedimentary rock samples from the Changcheng and Jixian systems show 4 prominent 207Pb/206Pb age peaks of 1.6 Ga, 1.85 Ga, 1.95 Ga, 2.35 Ga and 2.5 Ga, which is similar to the Meso to Neoproterozoic in the NCC, and indicate similar provenance. According to this, we conclude that the detritus of the Changcheng System were sourced from the inner NCC. Accompanied with the drilling data and materials obtained by other researchers, we suggested that the north and east margin of the Ordos block was uplift erosion area during Mesoproterozoic, and southwestern part was sedimentary area, whereas the southwest margin was a passive continental margin and separated with the North Qinling terrain by the Kuanping ocean.