Abstract: Shanhu Tungsten-Tin Deposit is one of the typical deposits in Nanling Tungsten-Tin Metallogenic Belt. The study on the alteration of the surrounding rock of the deposit is helpful to understand the genesis and metallogenic mechanism of the deposit, and to further guide the prospecting in the periphery and depth. By means of field geological survey, rock ore appraisal and X-ray diffraction, this paper reveals the alteration characteristics of surrounding rock and its relationship with tungsten-tin mineralization in Changyingling Tungsten-Tin Deposit in Shanhu Mining Area. The study results show that the alteration types of the host rock around the deposit are diverse, and the alterationprocess shows multi-phase and muili-stage characteristics, and there s a certain correlation between the ateration period and the mineralization period of thedeposit. The study believes that the alteration type of the electrification rock is the most significant for mineral exploration.