Abstract: Sha qu gas power plant Project Ⅱ was officially put into operation in 2012, a number of field researches indicated that the project was unreasonable in plant ventilation and cooling water tank layout, which resulting that the unit output was far from reaching the design index requirements of 2MW, the comprehensive utilization of gas was insufficient, the technical and economic indicators were lower than expected. According to the project characteristics and field researches, this paper emphatically analyzes the main causes of insufficient output of gas generator unit, and provides targeted and feasible rectification measures, so as to provide reference for the later rectification of the project.