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In order to solve the real-time problem in simulation, a method of using grey prediction model to predict simulation data is proposed to speed up the simulation speed, and corresponding improvements have been made to the practical application of grey model in simulation data prediction. Firstly, cubic spline interpolation is used to interpolate non-equal time interval sequences to obtain equal time interval sequences; then, the background value calculation process in the grey model modeling process is improved; finally, the idea of metabolism is combined in the continuous forecasting process to weaken the old data and strengthen the influence of the new data on the model. Finally, the grey model is connected to the aircraft distributed virtual simulation platform for verification. The verification results show that the improved grey prediction model has better performance and can accelerate 8.9% when it is connected to the simulation platform.