Division of labor in society promoted the spring up of academic profession and the formation of stratification system.In the later times of Middle Ages in Europe,the occupation of professor became a new social systematic occupation.The emergence of the occupation of teaching assistant was the first inner stratification in colleges and universities,which reflected the feature of automatic stratification of professor.Afterwards,this in turn emerged occupations such as lecturer,assistant professor,associate professor etc.,and formed a systematic stratification structure,which indicated the characteristic of induced institutional change.In China,academic profession of colleges and universities formed a four-level stratification system: professor,associate professor,lecturer,and teaching assistant.During the change of stratification system,it generally experienced four main stages: four-level stratification,single-level stratification,four-level stratification,four-level and thirteen grades,which indicated the feature of compulsory systematic change from top to bottom.At present,the stratification system of academic profession of colleges and universities in China has the features as follows: the combination of governmental guiding and universities' self-leading,efficiency-centered and position-centered.