Eclogites, consisting of garnet-rich matrix and omphacite veins, occur in the Donghai area, northern Jianasu. Some of them have undergone very intense deformation in the post-eclogite stage, while others not. No matter whether they are deformed or not, their early-stage retrometamorphism is displayed by the development of symplectitic intergrowths of diopside + albite in micro-cracks along grain boundaries within the omphacite veins. The geometry of the symplectite and the compositional variation of relevant minerals demonstrate that the symplectite resulted from the reaction between omphacite and a silica-rich liquid derived from the country rocks of the eclogites through micro-cracks, indicating material exchange between the eclogites and their country rocks-granitic gneissduring the exhumation of the eclogites. It is also demonstrated that deformation plays a significant role in the retrometamorphism of the eclogite.