The invention provides a large turn angle clutch torque transmission characteristic forecasting method for vehicle dynamics simulation. The method comprises the following steps: giving basic design parameters of a large turn angle clutch torque damper; forecasting a torque transmission characteristic of the large turn angle clutch torque damper; selecting a hyperbolic tangent fitting function based on fitting factors; selecting the fitting factors; fitting the hyperbolic tangent fitting function of different fitting factors with the torque transmission characteristic of the large turn angle clutch torque damper; repeatedly adjusting the fitting factors to obtain a valid fitted torque transmission characteristic of the large turn angle clutch torque damper, and constructing a large turn angle clutch torque damper torque characteristic forecasting model. The method can be used for accurately forecasting and considering a hysteresis characteristic and a torque transmission characteristic of a propagable n-level large turn angle clutch torque damper, and is applied to simulation analysis of a dynamics characteristic value of a vehicle transmission system with the large turn angle clutch model, thus effectively solving the problems about numerical stability and astringency in calculation.