With the new changes in the basic situation of population development in the three northeastern provinces in recent years，the coordinated development of population，economy and society in the three northeastern provinces is facing a series of challenges and opportunities，such as the continuous decline of the total population，the emergence of new characteristics and needs of the elderly group，and the new changes of demographic dividend. In order to further promote the process of realizing common prosperity in the three northeastern provinces，we should pay attention to coordinating and solving the uncoordinated factors between population and economic and social development，optimize and improve fertility policies and build a diversified fertility service system；Change the concept of population development and comprehensively deal with population aging；Learn from foreign experience and lessons，realize the coordinated promotion of policies and measures，coordinate and deal with the problems between population and economic and social development，and realize the great leap forward development of economic objectives and population and social coordination.