In 2021，global digital enterprises continue to develop rapidly，and many enterprises with excellent competitiveness have emerged. This research continues to pay attention to the development of global digital enterprises. Applying the research methods of the previous year，we have made a new evaluation and ranking about the competitiveness of global digital enterprises in 2021. The results show that from the perspective of overall competitiveness，Apple，Microsoft and Amazon are ranked in the top three；from the perspective of scale competitiveness，Amazon，Apple and Microsoft are also ranked in the top three；from the perspective of efficiency competitiveness，Versing，Nintendo and Apple are in the top three；in terms of innovation competitiveness，Samsung，Facebook and Huawei are in the top three；in terms of growth competitiveness，Fortum，Zoom and Doordash are in the top three. The United States，China and Japan continue to be the top three in the competitiveness of world digital enterprises in 2021. Digital enterprises in the United States rank first in the world in terms of scale，efficiency，innovation，and growth. China ranks behind the United States，and has a large number of excellent digital enterprises，especially the growth competitiveness of enterprises is outstanding.