Abstract: The emplacement and evolution of magma are not only a trend of material evolution but also a process of energy release and transfer. Through the calculation of the energy of granitic rocks of the Haiyangshan granite body, the authors discuss the application of rock energy geochemistry in the establishment of the heirarchical units of granitic rocks and check and verify this method through the examples of the Yuanshishan rock body and Limu rock body. Under the conditions of comagmatic, no matter whether the rock texture evolves from coarse to fine grains or from fine to coarse grains, the energy of rocks increases progressively from the early stage emplacement units to late stage emplacement units.