With the continuous change of the age structure of the population,the basis of the development of traditional econom-ics has changed,and it is necessary to develop the aging economics to adapt to the change of population.Aging economics is the economics of aging society.It mainly studies the impact of the change of age structure on economic growth and the adjustment of economic endogenous operating mechanism.As an independent subject,aging economics is different from population economics and geriatric economics.It is a parallel subject with aging sociology,aging demography and other branches of aging science.The following two principles must be considered in the study of aging economics:the analysis of age structure and the analysis of in-tergenerational exchange.