In this paper,which is concerned with the weighting problem of individual forecasting models in the traditional combination forecasting model,we propose an optimal deformation combination forecasting model based on the Theil inequality coefficient and the IOWA operator.We use the IOWA operator to endow different weight coefficients based on the different accuracy of each time with respect to the predicted value of each individual forecasting model,and then establish the optimal combination forecasting model.The model is applied in deformation data analysis and prediction.The experimental resul...