At present, the in-depth application of aero-engine performance model in the field of test flight has become a hot spot under the background of digital test flight, which is of great value and significance to the planning and organization of test sites in the process of flight test, risk identification and analysis, and auxiliary analysis and evaluation of test flight results. This paper studies the performance modeling of a two-rotor hybrid turbofan engine based on a general object-oriented simulation architecture. The model is constructed according to the actual air path connection and rotor physical connection between components, and considers the uneven distribution of fan outlet section parameters, the influence of high / low pressure turbine cooling and variable heat effect on the engine performance. In order to improve the model prediction accuracy, a correction method of the characteristics of rotating components based on the actual joint working line, and the deviation of the performance parameters under different working conditions is less than 3%; Finally, through the steady performance and transient performance of the model under different working conditions, the performance characteristics of the engine in the working envelope and the thrust transient characteristics of the sea level standard atmospheric environment are presented.