本文基于现代货币理论的观点，全面考察美国主权债务前景问题。认为美国主权债务本质上并不具有违约风险，反而主权债务的累积增加了美国国内的金融稳定性，主权债务带来的收入通过合理的财政政策也能促进经济增长。债务负担率更无需设置上限，唯一需要担心的是可能造成的通胀。结合美元的独特地位，经过量化研究，本文认为美国当前的债务水平和发展趋势对未来通胀的影响也不大。因此，我国仍可以安心持有美债，但要小心未来全球贸易趋冷对实际债权价值的不利影响

Based on the viewpoint of Modern Monetary Theory (MMT), this paper comprehensively investigates the prospect of the sovereign debt in the U.S.A. It is believed that the sovereign debt in the U.S.A does not have default risk in essence, but the accumulation of sovereign debt increases the financial stability of the country, and the income generated by sovereign debt can also promote economic growth through reasonable fiscal policies. There is no need to cap debt-to-GDP ratios. The only thing to worry about is the potential for inflation. Combined with the unique status of the U.S. dollar, this paper argues that the current debt level and development trend of the United States have moderate impact on future inflation after quantitative research. As a result, our country can still hold U.S. debt safely, but we should be careful of the adverse effect of future global trade cooling on the actual value of debt.