Based on the introduction to Induced Ordered Weighted Harmonic Average (IOWHA) operator combination forecast model, this paper firstly uses ARIMA model, grey forecast model and multiple linear regression model to forecast Chinese outward foreign direct investment(OFDI), then sets up combination forecast model and evaluating index system based on IOWHA operator. The results show that IOWHA combination model is better than other three single forecasting model, the combination model is used to forecast China’s OFDI value in the coming four years, the forecasting value shows that, in the coming several years, China’s OFDI still rises and has big increase and finally this paper gives the related conclusions and suggestions.