Recent studies reveal records of weak metamorphic-magmatic events of 1 300~ 1 000 Ma and 800~650 Ma in the North China Block (NCB), which probably correspond to collision events (Sibao orogenic event) and breakup events in the South China Block(SCB).The Sibao-age ophiolitic complex in NCB is represented only by Neoproterozoic North Qinling orogenic belt. Some granitic intrusive rocks were recognized along the North Qinling belt,which demonstrate properties of collisional and post-collisional granites. There are some volcanic-sedimentary rocks distributed along the northern margin of NCB, most of which do not show characteristics of the complex in the divergent margin, but probably reflect extensional process of the continent and continental margin. The rocks of 800~650 Ma are mainly basic dikes in the enriched mantle and sedimentary successions in continental rift, most likely related to the breakup of Rodinian supercontinent. The characteristics of sedimentology and palaeontology suggest that NCB was quite different from SCB in Proterozoic, but similar to the Siberia block. Based on the above discussion, the authors hold that, being a part of Rodinia supercontinent and located at its edge, NCB seems not to connect with the SCB but is quite close to the Siberia block.