Thallium is mainly distributed in potassium minerals, and was often linked to Pb, Zn, Cuand other elements in the formation of various associations of mineral deposits in the sulfides. The thallium resources in China are very rich, the massive reserves stand in the top of the world . The general situation of thallium resources and the main types of thallium deposits in the world are analyzed through comprehensive indoor research. The general situation of thallium resources and the types of major thallium deposits in China are emphatically analyzed. At last, the future trend of global thallium ore, especially China's thallium ore, is analyzed. The global demand for thallium ore is expected to increase in the future, while China's demand for thallium is still not large.