The authors probed into the course of evolution of American city smart growth and its historical relationship with public health, expatiated on the implementation principle, mechanism and efficiency of city smart growth intervening public health, found that the idea of American city smart growth plays an important guiding role in intervening public health, and put forward government behavior leading ways and whole society feedback system supporting ways for Chinese city smart growth to promote public health, so as to provide reference for the harmonious development between city planning and public health under the background of new normality in China.