Abstract: In this paper, the deformation and metamorphism of Liaohe Group and their relation have been discussed in detail. And then, the metamorphic facies, the distribution and dividing basis of metamorphic belt have been analyzed carefully. Meanwhile, the P-T-t locus characteristic of metamorphism has been investigated initially. The results show that, the metamorphism and deformation of Liaohe Group were happened under the compression system when the volcanic sedimentary series of paleoproterozoic ocean were subducted into the depths of the earth, and both of them belongs to the same thermodynamic process. Now, all existing tectonic phenomena can be considered to the final state of progressive deformation process under the same dynamic action. The Liaohe Group is a layered disorderly metamorphic tectonic unit. Only to instead of the original "Formation" that according to the sequence stratigraphy, the inherent features of Liaohe Group can be shown by using the lithologic mapping.