The Xiaorequanzi Cu(Zn) deposit of Xinjiang is located in the late Paleozoic island-arc of Danan Lake area, its ore bodies are hosted in a sedimentary rock suite of tuffaceous detritus, and its ore types are mainly massive chalcopyrite, sphalerite and other lodes. Based on a comparison of microstructures as well as distribution patterns of REE and trace elements between these sulfides, the authors hold that chalcopyrite has a better flowability than sphalerite, and the chalcopyrite tended to become active and move more easily than sphalerite under tense shear strain, and large-scale movement would lead to the concentration of chalcopyrite and finally the formation of the Xinjiang Xiaorequanzi Cu(Zn)deposit.