Eoarchean and older rocks are very rare all over the world, and any new discovery is an important contribution to the study of the formation and evolution of the earliest continental crust. This study for the first time reports the age and geochemical composition of Eoarchean rocks in eastern Hebei, North China Craton. Sample J2012 is from granodioritic gneiss, and J2013 is from a granodiorite dyke intruding into the granodioritic gneiss, they have magmatic zircon ages of 3785±8 Ma and 3773±6 Ma, respectively. Although they are similar in formation time and major element composition, they are different in rare earth element (REE) composition. Sample J2012 has the total REE content and (La/Yb) n ratio of 139.2×10 -6 and 8.44, being similar in composition to that of 4.03 Ga Acasta gneiss in North America. It is suggested that the granodiorite is formed in the low pressure conditions of plagioclase stability and garnet instability. On the other hand, sample J2013 has the total REE content and (La/Yb) n ratio of 163.5×10 -6 and 51. 16. The strong light to heavy REE differentiation requires that the granodiorite should be formed in the high pressure condition of garnet stability and plagioclase instability. Combined with previous study, it is concluded that eastern Hebei already shown the diversity of TTG magmatism as early as ~3.8 Ga, which supports the understanding of the existence of a huge continental basement of the early Paleoarchaean- Hadean. Anshan- Benxi and eastern Hebei are two ancient continental nuclei with different Archean forming and evolution history in the North China Craton.