Abstract: This article is based on monthly trade data for HS6 code products from 2017 to 2020. It employs a double-difference method to assess the impact of the additional tariffs imposed by the United States on Chinese exports. The study reveals that while the tariffs have suppressed the export value of Chinese products to the U.S. and diminished the competitiveness of such exports, they have indirectly diversified the destinations and pathways of Chinese product exports. Heterogeneous analysis results indicate that the impact of the tariffs is more pronounced on Chinese consumer goods and products exported through processing trade. Further analysis indicates that the imposition of tariffs has had a negative impact on the quality and structure of China's exports to the united states. This research contributes to the understanding of the economic effects of U.S. tariffs and provides policy insights for China in dealing with international economic and trade frictions, as well as advancing a higher level of openness to the outside world.

Key words: trade friction, US tariff, china export, double difference