Heitai gold mine is a large altered mylonite gold deposit which was proved up in the middle of 1980's, with concomitance of Ag and Cu. The mine put into production in the late of 1980's. Through enlargement and technical improvement, it grows into a large mine which can handle 900t ore a day. In the exploration of more than ten years, it brings us experiences as well as lessons. The thesis summarizes them,and brings forward effective approaches to further development of the mine together with prospecting fo...