With the rise and development of the central bank digital currency,attention has been paid to its impact on currency internationalization and international monetary system transformation.Currency internationalization is subject to the impact of a combination of economic,political,cultural and military factors,and is a"slow variable"that lags behind economic and financial globalization.At present,currency digitalization does not necessarily bring about or is the same to currency internationalization.However,in the digital age,currency digitalization is indispensable for currency internationalization.The central bank digital currency is expected to bring at least the following three marginal improvements to currency internationalization.First,it can improve the existing cross-border payment,and promote reform of the cross-border payment system by improving efficiency,reducing costs,and circumventing sanctions.Second,the smart contract technology of the central bank digital currency can not only expand cross-border payment scenarios,but also mitigate the risk of cross-border use of the central bank digital currency by presetting triggering conditions,thus enhancing the international acceptance of the central bank digital currency.Third,the central bank digital currency is relatively more advantageous in terms of convenience and anonymity.This helps to achieve a balance between privacy protection and payment efficiency in the digital age,and increases public acceptance of the central bank digital currency.