Abstract:At the beginning of the caojia garden in Tianjin, Sun Zhong yingyu Guangxu 29 years in Tianjin built private gardens, after zhili warlord Cao Kun, renamed caojia garden.Through the combing, induction and on-site investigation and textual research of the related historical materials " historical relics in Hebei district of Tianjin" and" discussion on ancient Jin men", this paper makes an in-depth study on the historical evolution, garden style, garden elements and spatial relationship of Cao 's garden, and fully proves that Cao 's garden has distinctive garden characteristics, which is an official building style which is not only a symbol of the late Qing dynasty, but also a combination of Chinese and western style with European style. The study of caojia garden is not only to reproduce its historical features, but also to enhance the soft power of the city by protecting the natural and historical environment in which the park is located, showing its historical and cultural connotation and specific historical and cultural atmosphere, exerting the cultural influence of the site park and its positive correlation with economic pull.