The urban sports spirit is a key element of urban temperament and an important aspect as well as a symbolic representation of urban culture. This paper takes the timeline of over four decades since the reform and opening-up as a starting point and uses Tianjin as a case study to analyze the “evolution” of the urban sports spirit nurtured by Jin-style culture. It explores the development and evolution of the urban sports spirit under the influence of reform and opening-up from the perspectives of time measurement and theoretical analysis. The research indicates that the shaping of Tianjin’s sports spirit requires and, in turn, nurtures: the accumulation of sports economic development, a solid material foundation of sports venues, the enhancement of citizens’ comprehensive sports literacy, and comprehensive government services. The direction of its mature transformation lies in adapting to new contradictory environments and deeply integrating with the spirit of Tianjin.