Using the methodology of the HP filter ( Hodrick-Prescott Filter ) , this article calcu-lates the potential economic growth rate and volatil-ity of the eight ethnic provinces and regions as well as that of the whole country,and using the theory of economic cycles, the articles creates six large sta-ges.Through a special research on economic data from the three cycles from 1978 to 2014 ,the article discovers that the potential economic growth rate of the eight ethnic provinces and regions was not only high,but moreover,exhibited an increasing trend.