Since the report of the 19th National Congress of the Communist Party of China proposed the construction of a digital China, China's digital economy has developed rapidly and gradually become an important support for achieving the digital development of China's foreign trade. The report of the 20th National Congress of the Communist Party of China further proposes to "accelerate the development of the digital economy" and "promote digital trade to accelerate China's transformation into a trader of quality". In this context, it is of great practical significance to study how the digital economy supports the digital transformation of Xinjiang's foreign trade. From the perspective of mechanism, the digital economy promotes the digital development of Xinjiang's foreign trade through three aspects: promoting digital industrialization and industrial digitization, bringing digital elements for improving quality and efficiency, and improving the innovation ability of enterprises. At present, Xinjiang's digital trade service platform has been initially established, and the digital transformation of foreign trade has a preliminary industrial foundation. However, restricted by such factors as small scale of digital economy, low proportion of digital economy, low integration of digital industry and traditional industry, insufficient use of digital elements, and insufficient digital technology innovation capability, Xinjiang's foreign trade digital transformation is faced with such problems as low driving force of digital economy. Therefore, this paper proposes paths such as improving digital infrastructure, cultivating and guiding digital industries, improving the level of industry digitization, building a digital factor market, enhancing digital innovation capabilities and talent cultivation, and effectively promoting the digital development of Xinjiang's foreign trade.