This article utilizes the 2015 Migrants Population Dynamic Monitoring Survey data in China and the city characteristics data of prefecture-level cities to study the impact of the characteristics of the inflow area on the separation of parent-child residency in migrant families. Model analysis results show that: migrant families choose to flow to a certain city not only because the corresponding city have a higher level of economic development and a higher proportion of tertiary industry in GDP, so that they can get a higher probability of employment, but also hope to enjoy the basic education services of cities. The impact of urban per capita GDP, industrial structure, elementary education, and annual average wage level on parent-child reunion of urban-urban migrant families is more obvious than that of rural-urban migrant families. And house prices have a more obvious inhibitory effect on the parent-child reunion of rural-urban migrant families. With the strengthening of the family migration trend, the policy makers should face up to the needs of migrant families, especially the rural-urban migrant families, to better promote the parent-child reunion of migrant families.