Abstract: U.S. is the first country of large-scale and commercial development of shale gas in the world for its abundant shale gas resources. Since the production decline regularity of shale gas well is obvious, it is of great academic value and practical value to study it. Based on the actual production data from a shale gas production unit in Pennsylvania, the method of decline curve analysis was adopted, the type of decline curve was determined, and the single well production and recoverable reserves were predicted. The results show that the shale gas wells of this unit are in line with the hyperbolic decline type, and the single well technical recoverable reserves could be higher.