The paper aims to explore the design direction of the public facilities of the square in combination with the development needs of the urban square, and think and summarize the scientific characteristic design path along the design direction. Going deeply into the real life, it is not difficult to find that public facilities always follow them, which creates more choices and brings greater convenience to the social life, and its value is very outstanding. The basic component of city square and the existence value are analyzed, and the present condition of the public facilities development of city square is summarized, the common aspects of these questions are extracted, then with the help of city square, the basic requirement of public facilities and design principles are further explored. Finally from respect for the people and respect for the regional culture, the specific characterization design train of thought is summarized. City square is the display window of urban civilization and charm, pay attention to it, find the appropriate characteristic design path, and summarize the ideal way and method to achieve better presentation effect, so as to sublimate people's convenience, safety, comfort experience to the level of praise and nostalgia.