This paper explores the sustainability of global economic imbalances, from the perspective of the current account stability, by taking 20 representative economic subjects' current account as a sample, using LLC, IPS and MW panel unit root test to examine the stability and robustness of current account. finally making the following conclusions: Firstly, We observed that the ratio of current and GDP goes up and down 15% except Singapore. In the 10 major current account surplus countries, the trend change of surplus in Asia countries is more obvious. Secondly, along with the intense changes in current account from 2000 to 2007, the internal stability of the global economic imbalance disappeared in 2007, being a unsustainable status, and then gradually returned to equilibrium after 2010. Thirdly, it shows that the results of panel unit root test is similar with the results of ADF test. As a little easing of the global economic imbalances from 2008 to 2015, global current account imbalance has improved a little. However, the test result of 1986-2007 section cannot reject the null hypothesis which means current account balance has been converted into unstability again. Fourthly, the current account imbalance shows a certain internal stability. The United States relies on the cheap import from Asian countries to curb inflation, and also the low interest rates of the Central Bank of Asia to support asset prices. On the contrary, Asian countries rely on the current account deficit of the United States to make up for the shortage of domestic demand.