数字化和高速发展的新技术改变了人们交易的内容与方式，在线平台数量的增长也促成了越来越多更小的商品、数字产品和服务能够跨越国际边界到达消费者们手中。在这个大数据主宰的信息化时代，数字贸易俨然已经成为一个国家贸易的重要部分之一。本文于是围绕数字贸易展开，探究了如何对数字贸易竞争力进行衡量，以及影响数字贸易竞争力的因素，其中重点探究了市场开放度对中国数字贸易竞争力的影响。从理论与实证角度出发，选取2005年至2020年该时间区间的数据，进行了一系列的实证回归分析，并进行了稳健性的检验以及内生性问题的解决。最终得出结论并成功验证，市场开放度对中国数字贸易竞争力具有正向且积极的影响作用。并以该结论为导向，对中国在市场开放度方面以及数字贸易的未来发展提出几点建议对策。

Digitization and the rapid development of new technology have changed the goods and mode of people's transactions. The growth in number of online platforms has also led to more and more smaller goods, digital products and services reaching consumers across international borders. In the information age dominated by big data, digital trade has become an important part of a country's trade. Therefore, this paper focuses on digital trade, explores how to measure the competitiveness of digital trade and the factors that have effects on digital trade competitiveness. And it especially focuses on the impact of market openness on China's digital trade competitiveness. Selecting the time series data from 2005 to 2020, the author carries out a series of empirical regression, tests the robustness and solves the endogenous problems. Finally, this paper draws a conclusion and successfully verifies that market openness has a positive impact on China's digital trade competitiveness. Guided by this conclusion, this paper puts forward some policy suggestions on China's market openness and the development of digital trade in the future.