In 2021，the US digital economy will grow as strongly as the US overall economy in terms of nominal gross output value and added value. Different from the overall economy of the United States，the real growth of the digital economy is almost as strong as the nominal growth，indicating that the digital economy is not affected by inflation. All major digital economy industries have achieved strong growth，including infrastructure，e-commerce and fee based digital services. The digital economy in the United States shows a significant polarization effect，and wealth is concentrated to the head companies at a high speed.