The Hucun copper deposit, located in the south of the Shizishan deposit in Anhui Province, is a typical skarn-type copper polymetallic deposit, which is mainly characterized by copper-gold orebodies in the shallow and copper-molybdenite orebodies in the depth. A systematic study of its ore-forming fluids of the shallow skarn-type copper deposit indicates that three evolutionary stages could be recognized in its rock-forming and ore-forming process, i.e., skarn stage (StageⅠ, subdivided into Ⅰ-1 and Ⅰ-2), quartz sulfide stage (StageⅡ, subdivided into Ⅱ-1, Ⅱ-2a and Ⅱ-2b stages) and carbonate stage (Stage Ⅲ). The results also show that there are three main types of fluid inclusions, namely liquid-rich phase (Type Ⅰ), subcrystal (Type Ⅱ) and gas-rich phase (Type Ⅲ). The evolution of ore-forming fluids at different stages are as follows: it was of high temperature (543~631℃) and moderate-high salinity (14.8%~20.1% and 44%~50.1%) at Stage Ⅰ, medium temperature (172~298℃) and low-moderate salinity (5.9%~16.9%) at StageⅡ, and medium-low temperature (158~247℃) and low-moderate salinity (1.7%~6.2%) at Stage Ⅲ. H-O isotope studies indicate that ore-forming fluid originated from magmatic water and then was mixed with meteoric water at the sulfide metallogenic stage. Geochemical characteristics of fluid inclusions reveal that the temperature was the main controlling factor for the shallow orebodies, the copper migrated at high temperature and then the ore-forming materials began to precipitate and concentrate to mineralize when the temperature rapidly fell with the continuous mixing of meteoric water and ore-forming fluids.