Abstract: Based on the study of inclusion typehomogenization temperature salinity pressure inclu sion composition and H.O isotopes, the authors consider that Xiayingfang gold deposit is characterized by typical porphyry-type deposit, Ore-forming fluid, which was mixed with a little of meteoric water in main metallogenic stage, mainly came from crust-mantle mis-melting magma. The rich ore district can be indicated by boiling inclusion group multifalies inclusion with daughter crystal and inclusion with richful CO₂. Three dimensional space variety of homogenization temperature contour line can determain rich ore area and orebody occurence.