Accurately measuring women’s reproductive intention and its influencing factors after the adjustment of China’s reproductive policy，and correctly evaluating the trend of reproductive intention have become key issues in the study of China’s reproductive policy adjustment. Based on the survey data of CSS2021，this paper studies the current situation of fertility level，fertility willingness and family planning. It is found that：（1）The average number of children for women aged 18-49 is 1.37，and about 40% of them have two children，who are the main body of the fertility policy target population；（2）The average number of children in Northeast，North China and East China is less than 1.3；（3）The ideal number of children of this group is highly stable，and the average ideal number of children is between 1.96-2.00，which is lower than the fertility replacement level of 2.10. （4）Although the second child fertility intention is absolutely dominant，the relative proportion decreases and the first and third child fertility intention increases，where the differentiation of fertility intention has begun to take shape. （5）People of childbearing age are less willing to have another child，and the proportion of women planning to have another child is lower than that of men. （6）There is still room to improve the third child fertility willingness of the post-90s. The key is to realize the transformation of fertility willingness into reality among people with uncertain intention.