Existing studies on migrant workers’ migration preferences towards large cities primarily focus on their economic income returns， neglecting the influence of central cities on the non-economic welfare of migrating families. Economic welfare is the basic goal of core family members during migration stage， while the ultimate goal is to pursue the quality of life for the family. This paper analyzes the impact of migration to central city on the quality of urbanization of married migrant workers by constructing a framework for urbanization quality. This framework focuses on the impact of migration to central city on economic welfare such as the income of independent migrant workers and their accompanying family members， as well as on non-economic welfare effects such as the reunion of migrant workers family —— the joint migration of spouses and the family migration with their children. It is found that the advantages of migrating to central cities are not only reflected in economic welfare， but also in non-economic welfare aspects such as family reunion and stability. In the migration decision-making process of migrant workers at different stages， the advantages of central cities have been strongly supported. Therefore， whether from the perspective of increasing the income of migrant workers， or from the perspective of focusing on the education and development of underage children， priority should be given to promoting the equalization reform of basic public services in central cities to promote the migration of migrant workers families.