The invention provides a generator active power and wind turbine generator parameter calculation method and a wind turbine generator model. The generator active power calculation method is used for establishing a wind turbine model, and the method comprises the steps: obtaining the wind speed and the air density of a wind turbine unit and unit parameters of the wind turbine unit, wherein the unitparameters comprise the blade radius of a wind turbine, the maximum wind energy utilization coefficient of the wind turbine, the optimal torque coefficient in optimal torque control of the wind turbine, the sum of the rotational inertia of the wind turbine and a generator and the optimal blade tip speed ratio of the wind turbine; and calculating the active power of the generator under the maximumpower point tracking control according to the wind speed and the air density of the wind turbine and the turbine parameters of the wind turbine. Through the implementation of the method, the active power of the generator under the maximum power point tracking control can be directly calculated through the wind speed and the air density of the wind turbine generator and the parameters of the wind turbine generator, and the wind turbine generator model can be simplified through the method when the grid connection problem of the wind turbine generator is studied.