A digital trade business environment index system was established. The final score of Beijing's digital trade business environment from 2005 to 2020 was calculated by factor analysis and entropy method, and the annual score was ranked. It was found that the comprehensive score of Beijing's digital trade business environment was generally increasing, the score of "technology market government environment factor" was increasing, and the score of "law and human factor" increased first and then decreased, Therefore, the business environment of Beijing's digital trade still has problems and needs to be optimized. Therefore, we should improve the legal environment and speed up the establishment of digital trade related laws; Cultivate and introduce technology and higher education talents.