The Hahaigang W-Mo polymetallic deposit in Maizhokunggar County, Tibet, is a tungsten and molybdenum polymetallic deposit, which is the first one to be explored in the Nyainqentanglha metallogenic belt. The basic geological characteristics of this deposit have been briefly presented in this paper. The results showed that the ore-forming age of this deposit is Early Cretaceous, and was probably the product of mineralization during the southward subduction and collision stage of the Bangong—Nujiang oceanic crust. Meanwhile, it has great significance on the study of regional magmatic evolution and mineralization, as well as on the regional prospecting prognosis.