The main railway line is the hub of urban transportation and the lifeblood of the rapid development of the city. Since the reform and opening up, the process of urbanization in China has been accelerating, and the conflict between the new and old urban areas has become the main contradiction of the current city. The abandonment of the old railway not only hinders the development of the city, but also affects the appearance of the city. As a witness to the glorious period of Shanghai Nanjing railway, the industrial railway site of Baogai mountain in Zhenjiang has become full of devastation. It is like an abandoned old man watching the prosperity and prosperity of the outer city. The design around the protection and renewal, on the basis of historical context to explore the design concept in line with Chinese characteristics, enhance people and the era of dialogue and designer human expression. With the development of economy and society, Zhenjiang is an ancient treasure city. The metabolism and renewal iteration of the city are inevitable. We cannot stick to the old way of life, but we must let the residents feel that this renewal iteration has a premise. Those excellent lifestyles, communication methods and material imprints in history must be able to continue today. In urban renewal and transformation, what we should pay great attention to is the inheritance, sublation and innovation of cultural heritage and historical genes in the present. The renewal design of Baogai Mountain Railway Industrial Site in Zhenjiang focuses on the conflict between the dense spatial texture of the old and new urban areas, integrates the urban gradient memory, and shapes the structure of the future spatial development of the city.