随着经济全球化的推动，科学技术的发展和资本要素的自由流动，越来越多的企业实现跨国贸易，推动了跨境电商的迅速发展。本文以G20集团数据为样本，利用主成分分析法（PCA）得到G20集团各个国家的贸易便利化指数，并通过实证分析验证贸易便利化对跨境电商的促进作用，可以得出如下结论：高水平的GDP、人口数量的增加对跨境电商具有促进作用，以及贸易便利化水平的发展对跨境电商具有重要的积极影响等。最终通过PCA中得到的结论从基础设施建设、简化通关流程、国际合作、电子商务环境这四个方面提出促进跨境电商发展的政策建议。

关键词：跨境电商、G20集团、贸易便利化、主成分分析

With the promotion of economic globalization, the development of science and technology and the free flow of capital elements, more and more enterprises realize cross-border trade and promote the rapid development of cross-border e-commerce. In this paper, Principal Components Analysis method (PCA) is used along with data from G20 to obtain the G20 countries trade facilitation index. Through empirical analysis the role of trade facilitation on cross-border e-commerce promotion can be verified and the following conclusions can be drawn: high-level GDP and increases in population can improve cross-border e-commerce, and development of trade facilitation has an important and positive impact on cross-border e-commerce. Results from PCA analysis conclude on policy proposals that infrastructure construction, simplified customs clearance process, international cooperation and e-commerce environment can promote the development of cross-border e-commerce.

Keywords: Cross-border E-commerce, G20, Trade Facilitation, Principal Components Analysis