The Sulu high-pressure (HP) metamorphic belt lies on the southeastern margin of the Sulu ultrahigh-pressure (UHP) metamorphic belt in northern Jiangsu. Its outcrops consist mainly of greenschist-facies rocks of the Meso- to Neoproterozoic Yuntai Group-complex. Nevertheless, typical blueschist was only found in the drilling cores from Yangji Town of Guanyun County in northern Jiangsu. The glaucophane greenschist facies rocks discovered in such places of Lianyungang area as Hongshizui, Dongxiliandao and Xieqigou consist of winchite, barroisite, actinolite, albite, phengite, sphene, aragonite, etc. These garnets as a kind of low-diffuse rigid mineral have undergone multi-stage deformation and metamorphism. The evidence of the metamorphism is preserved in the compositional zoning of garnet. These minerals indicate that the outcrops in the study area are part of a HP terrane which was overprinted by greenschist facies metamorphism at the late stage. This discovery provides important evidence for dividing geotectonic units in the Sulu high-pressure terrane.