Prediction of Population Structure in China based on Difference Equation Model

Abstract

Population is the core issue of the development of human society, and predicting the future population changes is an important basis for a country or region to formulate corresponding policies. The theoretical basis of the prediction of population development process is the population development equation, that is, the mathematical model of population development. Aiming at the problem of population structure in China, based on the collection, calculation, collation and analysis of relevant population data, this paper builds a prediction model of population structure in China based on the difference equation method, so as to predict the population of China, and compare it with the original population data to verify and improve the model. The results show that if the current family planning policy remains unchanged, the population structure of China will be aging seriously by 2050. If the two-child family planning policy is implemented, the aging trend of China's population structure will be obviously improved, and it will be an adult population structure after 2030. If the family planning program that is looser than the two-child policy is implemented, the population structure of China will change fundamentally, and the population structure will be in line with the characteristics of younger population structure. In order to provide some reference for the formulation of relevant policies.