Quartz diorites in Hanggale area are characterized by strong REE fractionation, enrichment of LREE, and without significant Eu anomalies, implying an I type granite. Enrichment of Th、Ta、Sr、Hf elements and depletion of Nb, Sr, P, Ti elements. In the R1 R2 diagram, most of the samples are concentrated in the pre collision granite area. In the Nb Y diagram, the samples fall into the area of the volcanic arc syncollisional granite. In the Rb (Y+Nb)diagram, the samples lie in the area of volcanic arc granite. LA ICP MS zircon U Pb dating shows that its age is 266.4±3.7Ma. The Middle Permian quartz diorite of Hanggale was a pre collisional volcanic arc granite, and Hanggale area was a volcanic arc that belonged to active continental margin in Middle Permian.