Abstract: The progressive fertility intention of floating population was studied based on the dynamic monitoring and survey data of floating population in 2018 and the method of binary Logistic regression analysis model. The results showed that there were significant differences in fertility willingness among different children. One child had a particularly high willingness to give birth, and the willingness to give birth to two or more children was lower, especially for three or more children. The influencing factors of different children's progressive childbearing intention of floating population are obviously differentcontrolling the basic characteristics, mobility characteristics and economy of floating population. After the situation, the number and gender of children in the floating population are important factors affecting their progressive willingness to have children. Relevant countermeasures and suggestions are put forward under the background of the national three-child policy to moderately improve the fertility willingness and level of the floating population. Building a friendly child-rearing environment for the floating populationis of great social practical significance.

Key words: floating population, order of child birth, progressive childbearing, fertility willingness