The invention discloses a gas turbine dynamic simulation method for a triple co-generation system, which is characterized by comprising the following steps of: determining a composition structure of the triple co-generation system; establishing a gas turbine model, and establishing mathematical models of the components according to the characteristics of the components; solving a gas turbine model. According to the method, the gas turbine is divided into different devices and components, the lumped parameter model is adopted, part of dynamic models are used for solving the initial static variables, the simulation efficiency is high, repeated modeling is avoided, meanwhile, the dynamic models can rapidly enter the steady state, and in addition, the lumped parameter model and 10ms small-stepsolution are used for guaranteeing the model precision.