Through reconstructing the index system of the new economic index，we collecte the data to estimate and evaluate the development degree of the new economy in 22 countries. The study finds that the highest new economic index is the United States，followed by Japan and China；the highest scores on innovation ability，digitalization，networking and intelligentization are all in the United States，while the highest scores on globalization and greenization are separately in Netherlands and Switzerland. Economic level and technological capability are prerequisites for the development of new economy，while structural imbalance is the core factor that restricts the development of new economy.