The 7th census provides the latest data for migration study in China，which shows that the size of floating population has reached 376 million，exceeding people’s expectations. Based on data from other sources，this paper revises the data of total migration from 2010 to 2019，and analyzes the trends of migration based on the preliminary public data of the provinces. After the beginning，acceleration and transition period，migration has entered a period of saturation and differentiation，the growth rate has declined，the rural-urban migration is still an important force to promote urbanization，the southeast coastal area is always the center of cross-provincial migration，but the central and western regions has done well in the intra-provincial migration，urban expansion brought about the rapid growth of migration within city，being challenges to public administration. The data on migration of the 7^th census have prompted us to reflect，and provided opportunities for the application of new technologies.