Abstract: Since the 1990s, migrant worker group has been divided into the old and new generation of migrant workers. In order to understand the situation about their city settlement willingness and the influencing factors, this paper analyzed the factors impacting the migrant workers’ city settlement willingness from five aspects which were individual characteristics, family characteristics, work characteristics, policy factors and psychological factors based on sample data of 3358 migrant workers from 9 provinces. The results showed that the nature of work, educational level, housing satisfaction and the new rural cooperative medical system had significantly positive effects on the new generation of migrant workers’ city settlement willingness, whereas marital status had significantly negative effect on it. Gender, educational level, house owned in the countryside, monthly income, the average daily working time, life satisfaction and endowment insurance had significantly positive effects on the old generation of migrant workers’ city settlement willingness. Therefore, in order to improve migrant workers’ city settlement willingness, on the one hand, more education and training opportunities should be provided to improve the professional skills and working quality; on the other hand, in order to provide basic protection for migrant workers in the city, the social security system should be improved and perfected.