A zone of eclogite-garnet lherzolite-spinel lherzolite complex occurs in the Archean basement, running from the east seacoast in Shandong through northern Jiangsu into the Dabie Mountains for about 1200 km. The complex suite has a sequence consisting of garnet lherzolite, spinel lherzolite and dunite in the lower part, and eclogite and garnet pyroxenite in the upper part. The garret lhezzolite, spinel lherzolite and dunite are of interbedded layer. Over 1000 of the complex blocks are exposed as boudins resulting from stretching and shearing, which have formed a specific 'melange' with their country rocks including gneiss, amphibolite and granulite. The garnet lherzolite is similar in main chemical composition to the xenoliths from the basalts in eastern China, is characterized by a high content of Mg0 for the olivine,. clinopyroxene, orthopyroxene and garnet. The fresh garnet Iherzolite has a total REE content of 2.41一14.23 ppm, a.nd shows much the same REE patterns which are similar to those of pyro- lite. The equilibrium temperatures and the pressures of the minerals range from 800 to 1371℃.and from 35 to 49.8 ×108 Pa respectively. The.paleo- geotherm is essentially coincident with the continental geotherm. The age of the garnet lherzalite deter mined by Sm-Nd method is 925± 53 Ma. The authors suggest that the garnet lherzolite represents essezltially paleo- pyrolite of South China.