Situated in the eastern edge of the North China craton, Banshigou is one of the most typical terrains for the Precambrian study in China. Metamorphic complex around Banshigou iscomposed of TTG (80%) and metasupercrustal rocks (20%), with the latter being the inclusion of the former. Six samples from the metasupercrustal rocks of Banshigou were dated by the Sm-Nd method and, among them, four samples had a very good linear isochron, which gives an age of 2605±98(2σ) Ma, withINd0.50933±7(2σ), andεNd(t)+1.5±1.1. It represents the age of amphibolite facies metamorphism. The model agestDMfrom the four smples are within the range of 2790~2845 Ma, and the averge value is 2818 Ma, suggesting that the original rock of the metasupercrustal rocks in Banshigou area was derived from the depleted upper mantle about 2818 Ma and was formed in 1818~2605 Ma.