Abstract: Abstract：The Huachanggou gold deposit is a hydrothermal alteration-type deposit controlled by a ductile shear belt. The paper summarizes the application of the organic hydrocarbon gas method in gold exploration in the Huachanggou gold deposit. Analysis of the composition of quartz inclusions in ore and comparison of the content features of hydrocarbon components in different types of rock in several levels show that a certain amount of organic matter had participated in the process of gold mineralizing in this gold deposit. Organic hydrocarbon gas is its important associated gas component and there is a close relationship between hydrocarbon gas anomalies and gold mineralization in space. Therefore, the application of the organic hydrocarbon gas method has great significance for looking for deep blind ore deposits.