he dome-shaped geological body developed at Wugongshan Jiangxi province, whose composition and genetic mechanism seem to have similarities with classic metamorphic core complexes, which also comprised of the kernel and shell with the characteristics of three-tier structure. However, its core is mainly granite, stratum of nuclear and nuclear are almost contemporaries, there is no \"ancient metamorphic core, its formation mechanism is mainly caused by magma diapir strong emplacement local crustal uplift and stretch slip cover. So, to be renamed \" the magma core complex at Wugongshan \" is more appropriate. The composition, formation age and genetic mechanism of dome-shaped geology at Wugongshan represent its basic characteristics, demonstrate the reason why renamed the \"the magma core complex\", and discusses the prospecting significance of decollement.