Abstract: The Meso-Neoproterozoic are wildly developed in North China Craton (NCC)with the distribution of Changchengian being the most extensive. Taking the Changchengian in the south NCC as study object, coupled with the isotopic chronological and petrological analyses, it suggests that the Xiong'er rift is a plume rift responding to the dispersion of Columbia supercontinent. Seismic data show that the Changchengian in southern part of Ordos Basin and Qinshui Basin covered by Phanerozoic strata respectively developed half graben-like rifts and garben rifts. Aeromagnetic data indicate that a rift system with strike of NE developed in the west to Xiong'er rift and the Qinshui Basin rift is the extension of the north branch of Xiong'er rift. The filling process of rifts can be divided into four stages. The early rift stage developed thick andesitic volcanic rocks; the later rift stage developed coarse clastic rocks; the sag stage developed relative fine clastic rocks; and epeiric sea stage developed carbonate rocks. Cuizhuang and Chenjiajian formations of sag stage developed dark argillaceous rocks and the black shale in Cuizhuang Formation is evaluated as effective source rock. Bitume was observed in the crack of dolostone of Luoyukou Formation. Longjiayuan Formation developed dissolved pores and large vugs. The argillaceous sandstone and muddy limestone of Lower Cambrian is the well cap rocks. These strata together with the underlying source rock in Cuizhuang Formation and reservoir in Luoyu Group, constitute the potential accumulation assemblage of Changchengian which could be still effective at present.