Counter-rotating propfan engine is an advanced and efficient propulsion mode, which has a broad application prospect. In order to obtain the variation characteristics of the performance of a counter-rotating propfan engine, this paper takes a typical counter-rotating propfan engine as the research object, and builds a comprehensive analysis model of the counter-rotating propfan engine based on the integrated calculation model of the dual-rotor turboshaft engine, the calculation model of the counter-rotating reducer, the calculation model of the fan component, and the aerodynamic and thermodynamic relationship of the component structure. The rules of engine design point parameter matching and non-design point regulation are analyzed.