摘要：Average life expectancy is an important indicator to measure the quality of life. It reflects not only the levels and patterns of mortality, but also the basic indicator of the health of a population. The study on levels and changes of average life expectancy should be addressed in current China, because it directly reflects the links between population health and social economic development. Therefore, to build good population environment for a wealthy country, we should try to improve population health and develop our economy at the same time. The concept of population security will help to make proper development strategies of population health and social economic policies.
