In recent years, under the background of the developed economy mired in sovereign debt crisis, the global economic growth is weak, the good growth performance of Africa's economy has attracted more and more attention. It seems people are increasingly convinced that the African economy is or is moving into high growth or fast growth track. But Africa is not a political and economic entity, but a continent made up of more than 50 countries. In the situation of accelerating economic growth, the growth performance of different countries and different industries is very different. This paper tries to probe into the impetus of economic growth in different types of countries and the sustainable development of this kind of growth based on the panoramic scanning in twenty-first Century. <<