The Nd model ages of the Precambrian metamorphic stratum in the northeastern Jiangxi have been studied in this parper. The values of TDM range from 1437.23 to 2741.40 Ma with an average of 1 865.27 Ma. In the course of redeposition, the value of TDM was decreased because Volcanic materials from upper mantle was mixed into sediments. Therefore the authors believe that only the value of TDM of the sedimentary rock with little volcanic materials can represent the real age of formation of the continental crust in terrigenous region. The values of TDM from 19244.52 to 2741.40 Ma are given by six samples with volcanic materials. The everage value of TDM is 2272.81 Ma.ΣNd=-10.15.143Nd/144Nd =0.5121125. It is inferred that there is a late Archaeozoic continental crust in the northeastern Jiangxi and its neighbour which has not exposed yet, and this continental crust could be the Proterozoic terrigenous source region.