Chronological data show that two phases of basic volcanic activity appeared at about 2. 7 Ga and 2. 5 Ga in the North China craton in the Early Precambrian and represented two extensive crustal growth events respec-tively. Distribution and geochemical feature of basic volcanic rocks, and relationship and associations between basic volcanic rocks and other rocks suggest that the outpouring of basic volcanic rocks between landmasses in the Neoarchean increased crystal area, pieced the previously isolate mini - landmass together and caused the crustal growth. Within a landmass crust grew dominantly in the way of mantle plume. In the homogeneous part of the crust, where some magma intruded into the shallower crust and even spilt over the earth's surface, crust was mainly thickened in the way of underplating of basic magma. These two patterns of crustal growth, which supplemented each other, jointly resulted in the North China Paleocontinent of the end Archean.