The relationship between United States and China mainly focus on trade, which plays an important role in the quality of China exports. Based on the recent Sino-US trade situation, this paper explores the micro-path of the impact of direct investment on the quality of Chinese export products. Collecting the data of 7 manufacturing representatives in China from 2011 to 2016, we do research on the U.S. direct investment impact to the China exports quality. The empirical results show that FDI has significantly improved the quality of Chinese export products, research and development investment as well as wage level, and also, has a positive impact on product quality. Then, we get further study to different product categories -- capital goods, intermediates and consumer goods. We found that the U.S. direct investment in consumer goods industry is not conducive to the quality of export products. What’s more, due to the weakening advantages of Chinese labor-intensive industries, it is urgent for us to realize that upgrading our own technology is the fundamental approach in improving exports quality. Finally, according to the research conclusion, this paper makes a further analysis of the current trade situation between China and America, putting forward positive suggestions on how to use direct investment to improve present trade condition.