The policy of "double reduction in education" has aroused thousands of waves, and all sectors of society have launched discussions on its advantages and disadvantages. How to alleviate the negative impact of the "double reduction in education" policy, and how to give full play to the "increase" and "decrease" efficiency of the "double reduction in education" policy have become the urgent problem to be considered by all sectors of society. In order to implement and promote the "double reduction in education" policy, the Central government promulgated the "Family Education Promotion Law", promoting the implementation of the "double reduction" policy in detail, leading to the advent of the era of "raising children according to law". This paper summarizes the difficulties existing in the promulgation and implementation of the "Double reduction in education" policy and the "Family Education Promotion Law". Under the background of "double reduction of education", the author explores the way to improve children's welfare through family education and makes suggestions for building a child‐friendly society.