In the process of rapid urbanization, landscape architects focus on introducing nature into the city to the greatest extent. Through long-term practice, we think about the relationship between different types of soil, the ecological diversity of animals and plants, human beings, built-up areas, and non-built-up areas, and start from this to explore the meaning and logic of large-scale site space. This article proposes the concept of a living soil ecosystem as an invisible infrastructure, reinterpreting the connotation of infrastructure as the foundation of resilient cities, the carrier of urban nature and landscape, and responding to climate, ecology, culture, etc., that future cities must face the challenge. Taking the Catalan Glory Square Park (la place-parc des Glòires Catalanes) in Barcelona as an example, this article discusses how to start from soil protection, break down the barriers between traditional urban construction-related industries, protect ecologically diverse spaces and connect them to form a system, making the site more adaptable to the function and development of the city.