Abstract: Based on researches of metamorphic rocks and minerals in the metamorphic belt in Harlik, the authors suggest that the metamorphic belt underwent two metamorphic stages. The first stage was the regional thermal metamorphism of high-temperature (T= 922～780℃)and low-pressure during the early-middle Carboniferous of late Paleozoic. The second stage was the regional faulting metamorphism of medium-temperature and medium-pressure (T= 450～670℃, p= 2.3～ 4.1Kb)during the end of Carboniferous. The second stage can be divided into four metamorphic zones, retailed research suggests the following tectonic evolution mode1: Therma1 metamorphism was related to intra-island-arc tension, while regiona1 faulting metamorphism was caused by A-type subduction in the process of collisional orogeny.