This research aims to explore the design strategy of public facilities for children. Children group is a special group, whose behavior and psychology need to be taken seriously and scientifically guided by society and families. Aiming at such a group, some targeted attempts and improvements have been made in the field of public facilities, and many designers have begun to communicate and discuss with each other in the design principles and forms of expression. From children's public facilities, with the actual situation as the main argument and analysis, the research finds the reason and puts forward that we should departure from the audience object, combining with the characteristics of children's body and mind to try a variety of design, and gives several aspects, including basic sensory aspects of care, proper scale, and higher levels of emotional care, lists the specific design ideas. Proceeding from children's physiological characteristics and behavior patterns, targeted design of public facilities used by children can create a friendly environment for children's growth and promote the harmonious progress of society.