Based on the perspective of China’s trading partners’ import trade facilitation, this paper selects three indicators, i.e. import file, import time and import costs, to build the evaluation system of trade facilitation, and makes an empirical study of the effects that the system has on China’s export trade, using the improved gravity models. In addition, this paper chooses two sets of schemes of trading partners’ import cost index designing to examine the influence of improvement of trading partners’ trade facilitation on China’s export trade, on the basis of regression results of sub-regional improved gravity model. The results show that, the improvement of trading partners’trade facilitation can significantly promote China’s export trade. While trading partners’ import costs were reduced to the average level in the region, the amount of China’s total exports would increase 196.37 billion dollars, while the import costs are minimized, the accrual of China’s total exports turns out to be 1143.106 billion dollars.