Abstract: Taking the migrant workers as the research object, this paper studies the social integration of migrant workers between different generations in new urbanization. It first describes and analyzes the current situation of social integration of migrant workers and their intergenerational differences; then, it makes an empirical study on the influencing factors of social integration of different generations of migrant workers. The results show that: Firstly, migrant workers have a strong desire for social integration, and the second generation has stronger desires than the first generation; Secondly, health and education have a significant impact on the social integration of migrant workers and generational differences are significant. Thirdly, there is no difference between the two generations of migrant workers' urban living conditions and their willingness to social integration. Fourthly, the main purpose of the first generation of migrant workers is still to get economic income, and they pay attention to the life satisfaction of working cities, while the second generation pay attention to job satisfaction. Fifthly, the scope and company of migrant workers have significant influence and intergenerational differences on their willingness to social integration. Based on the above research conclusions, in order to conducive to promote the social integration of migrant workers, it is necessary to strengthen the human capital of migrant workers through education and training, promote the social participation of migrant workers, cultivate the social capital of migrant workers, create a fair employment environment, and protect their legitimate rights and interests.