The digital economy is the biggest driving force of theeconomic growth of the United States. In the long run，the growth rate has always been more than three times of the overall growth rate of the United States economy. The digital economy of the United States is still the world’s leader in many fields. The U.S. companies are not only the leader in the overall scale of the digital economy，but also have a very complete range of digital economy categories，and occupy the global leading position in almost all digital economy segmentation industries. The U.S. digital economy is showing a trend that the strong are always strong and the winners take all. The income growth rate of the leading enterprises in the digital economy of the United States is more than seven times that of the overall economy of the United States，and more than twice that of the overall digital economy. In the field of e-commerce and cloud，Amazon is the largest；in the field of Internet search，Google occupies more than 90% of the market share；in the field of intelligent terminals，apple is the only one. And so on. This is also a basic feature of digital economy. As marginal cost approaches zero，marginal revenue increases with network effect. The leader will gradually form a huge competitive barrier，which will swallow up all the markets. Although China is leading the world in digital economy and occupies the leading position in most fields，the rapid development of China’s digital economy still makes the United States sleep hard. Especially the Internet giants such as HUAWEI，Tencent，Alibaba and Tiktok have posed a substantial threat to the leadership of the digital economy in the United States. In this case，the United States，on the one hand，uses administrative power to suppress and restrict the development of Chinese enterprises，on the other hand，it is constantly formulating industrial policies to compete with China with the strength of the whole country.