为探究处于疫情防控常态化下的中国如何对外建设高质量自贸区，实现合作共赢，以中智自贸区为例，在定量描述中智自贸区概况的基础上，利用贸易互补性指数发现中智双边产品互补性较强，中国主要出口附加价值较低的产品至智利，且疫情对中国出口品的互补性影响较大。又引用了合成控制法证明自贸区的建设的确带动了中智贸易流量的增长，肯定了建立自由贸易区对于中国外贸持续发展具有积极作用。最后根据研究结果，为疫情防控常态化背景下中国对外自贸区的发展提出针对性建议。

The paper takes China-Chile Free Trade Zone as an example to explore how China can build a highquality free trade zone with foreign countries under the regular epidemic prevention and control, and achieve winwin cooperation. Based on the quantitative description of China-Chile Free Trade Zone, the trade complementary index is used to find that China-Chile bilateral products are highly complementary, and China mainly exports products with low added value to Chile. The epidemic has a great impact on the complementarity of Chinese exports. The synthetic control method is also adopted to prove that the construction of free trade zone has indeed driven the growth of China-Chile trade flow, affirming that the establishment of free trade zone has a positive effect on the sustainable development of China's foreign trade. Finally, according to the research results, some suggestions are put forward for the development of China爷s foreign free trade zone under regular epidemic prevention and control.