Abstract:Based on the statistics from 274 questionnaire focusing on the deviant behavior of migrant workers in 5 construction sites in Nanjing,Zhenjiang,Changzhou,Wuxi and Suzhou and the method of hierarchical clustering,this paper found that the deviant behaviors can be classified into four types,namely the faults in the process of production,political struggle,laws violation and unlawful profit-making.It also calculated the severities of different deviant behaviors.More than 55% migrant workers acknowledged the stigma effect,and the acknowledgement to stigma effect differs little among migrant workers of different genders,ages and educational levels.And there is a close relationship between the stigma effect and migrant workers’ sense of integration into cities.Finally,the paper put forward some countermeasures to reduce the deviant behaviors,better the image of migrant workers and enhance the intergroup relationship between migrant workers and city residents.