Abstract: Giant tight sandstone gas fields are characterized with poor reservoir property, large gas bearing area, strong heterogeneity and enormous scale of reserves and production. Recovery factor and ultimate gas production are the key indicators to guide the long-term stable development of gas field, formulate development technical strategies and evaluate the development effect of gas field. Due to the small pore-throat and complex porous flow mechanism of tight sandstone gas field, it is difficult to obtain accurate recovery data using conventional laboratory simulation methods. Taking Sulige giant tight sandstone gas field as the research object, typical blocks selected from the central, east, west and south zones are detailedly analyzed, and production wells are classified into three types according to geological characteristics and development effect. The area ratios of various well blocks are restricted by braided-river sedimentary facies belts. A large-output well with long production history and basic quasi-steady state is selected as the analysis sample. The productivity instability analysis and production curvilinear integral methods are applied to evaluate the average dynamic reserves and ultimate accumulated production for each type of well. The single-well control scope is validated comprehensively using reservoir scale, structure and production dynamic characteristics. Using area proportional weight method, the gas production rate and recovery factor restricted by technological level are predicted in case of enough complete well pattern. The research result shows that the aforesaid recovery factor in each large block of gas field is 26.8%-75.5%, averaged at 57.0%, far lower than the conventional gas reservoirs of 80%-90%. Based on the current technology, this gas field has the limited production of 2.18×10¹²m³, and the maximum economic production is 1.27×10¹²m³. In the future, with the technology improvement, development cost will be reduced to achieve the large potential of output increase.