State-owned enterprises are the mainstays of national economy that have attracted many university graduates when they are choosing a career. However，some state-owned enterprises are eager to recruit those who have a relative working in their certain enterprise，which may result from historial and realistic reason to some degree. This phenomenon has demonstrated the common form of intergenerational transition in China. In this paper，we aim to investigate the consolidated social class phenomenon using the case of a state-owned coal enterprise in Shanxi，and put high emphasis on reflux university graduate. We have analyzed the factors that lead to stratum solidification phenomenon，then further explored the influence of this phenomenon which may effect the town in which this coal enterprise locates. Finally，we would like to propose conclusions as well as thoughts about this phenomenon.