Family migration has become the major mode of rural-urban migration in China，characterized by staging and dynamics. Previous studies have mainly focused on the impact of land on individual migration decisions， paying less attention to family migration， and few studies have examined the impact of land at different stages of family migration. From the perspective of the New Economics of Labor Migration theory， a staged dynamic decision-making mechanism for family migration was constructed based on the Todaro model， which divides family migration into two stages： family separation stage and family reunion stage， and empirical analysis was conducted using the data of the 2017 China Migrant Dynamic Survey. The findings reveal that owning homestead land has a significant negative impact on family migration. For families that own homestead land， homestead land area has a significant “positive U-shaped” impact on family migration. Compared to the family separation stage， the endowment of homestead land has a greater impact on the family reunion stage. Based on the results， it is recommended to further ensure the stability of farmers’ land rights， explore the establishment of a rural homestead land transfer system， and formulate public services and household registration systems to meet the basic needs of migrant families.