The purpose of this paper was to explore the effects of organization socialization on migrant workers' intent to stay, especially the mediating effect of employee relations on them by 396 available data of migrant workers. Main conclusions have drawn as following: First, Four factors of organization socialization, including training, understanding of the organization, coworker support and future prospect, have significant impact on migrant workers' intent to stay. Second, employee relations have significant impact on their intent to stay. Third, employee relations have mediating effect on organization socialization and migrant workers' intent to stay.