The Square Pagoda Garden in Songjiang designed by Mr. Feng Jizhong is a model work of Chinese garden and modern architecture. Its basic pattern embodies the core idea of “with the old to be new”. This study mainly interpreted the Square Pagoda Garden from two dimensions of garden space and architectural structure, analyzed the unique creative characteristics and design ideas of the Square Pagoda Garden in combination with the characteristics of traditional Chinese garden architecture, and explored the “old” and “new” in the design of the Square Pagoda Garden.