The Lajishan tectonic zone, 650 km long from west to east and occurring within a crystalline landmass consisting of Proterozoic strata, is an active tectonic zone with early Paleozoic volcanic rocks abundantly developed in it. Based on many years' field investigation in the area, it is considered that the early Paleozoic evolution history of the area bears typical characteristics of rift belt, which are revealed by researches of not only regional geology, petrology and structural deformation, but also geotectonic evolution. Since the late Paleozoic, intracontonental orogeny has taken place. However, it is an open question that the tectonic belt belongs to the tectonic window of subsequent multistage elevation.