Abstract: SinceChina’s reform and opening up,social classes,whether they are examined from the perspective of profession or from the perspective of social status,have been flowing frequently.From the perspective of profession,the flow is mainly from the public ownership to the non-public ownership and from the primary industry to the second and third industry.Some professions will shrink and even disappear,while some will expand continuously within certain periods in the future.From the perspective of social status,the flow is mainly within different classes or the same class,or in the form of flow of the entire class.Within certain periods in the future,the flow of the weak and middle classes will become the main trend,and the gap between the mighty class and the weak class will become larger and larger.

Key words: social class, class flow