To explore the design functions and methods of public facilities in urban leisure squares, and provide reference and reference for the design of public facilities in urban leisure squares.Starting from the functions of public facilities in urban leisure squares, this paper discusses the relationship between urban leisure square design and public facility design, and explores the design methods of public facilities in urban leisure squares from three aspects. In the process of designing public facilities for urban leisure squares, it is necessary to make reasonable use of regional cultural elements, showcase urban characteristics, consider the different needs of different populations, design humanized public facilities, follow the green design concept, and achieve sustainable design.