The supercrusc rocks such as basic granulites and aluminium-rich gneisses located in Huadian area，Jilin Province, have undergone the granulite facies metamorphism. According to associations and transformation relations of minerals，metamorphism of granulites can be divided into three stages, i.e.，the early amphibolite facies metamorphic stage (T=575-600℃，P=0.59 GPa)，the peak granulite facies metamorphic stage（T=835℃，P=0.85 GPa），and the late amphibolite facies metamorphic stage （T=620℃，P=0.70 GPa）, which make up an anticlockwise PTt path. The IBC path suggests that these metamorphic rocks were formed in island arc or active epicontinental environments.