Sustainable development is one of China's important development strategies and a brand-new development concept. The city is the symbol of human civilization, therefore, if China wants to implement the strategy of sustainable development in the 2000+0 century, it must first realize the sustainable development of the city. Starting with the analysis of the connotation and goal of urban sustainable development, this paper studies five basic points of urban sustainable development in China, and then puts forward the realization mechanism of urban sustainable development in China. Sustainable development is one of the important development strategies in China. Its core idea is that healthy economic development should be based on ecological sustainability, social justice and people's active participation in their own development decisions. It is a brand-new development concept. Because the city is the symbol of human civilization, the focus and crystallization of economic, political, scientific, cultural, population and ecological environment development in an era, and an important symbol of a country's modern civilization, the sustainable development of any country is first manifested as urban sustainable development. If China wants to implement the strategy of sustainable development in 2 1 century, it must first realize the sustainable development of the city. I. Connotation and Target of Urban Sustainable Development Urban sustainable development refers to the realization of highly developed urbanization and modernization with long-term sustainable growth and structural optimization of cities on a certain time and space scale, so as to meet the realistic needs of contemporary urban development and the development needs of cities in the future. The sustainable development of cities includes not only the sustainable development of economy, but also the sustainable development of civilization and ecological environment, the core of which is no pollution. Drawing lessons from international practices and combining with China's national conditions, China's urban sustainable development goals should include the following four contents. 1, the overall goal. All cities in China must follow the road of sustainable development in which population, economy, society, resources and environment are coordinated, so as to achieve the grand goals of social civilization and justice, high economic prosperity, beautiful and clean environment and virtuous ecological cycle. 2. Structural objectives. Including population structure (such as population density, average life expectancy, etc.). ), infrastructure (such as per capita road area, per capita housing area, etc. ), urban environment (such as pollution control, air quality, etc. ) and urban greening (such as per capita green space and green space coverage rate, etc. ) .3. Functional objectives. Including material reduction (such as wastewater treatment rate, waste gas treatment rate, etc.). ), resource allocation (such as per capita domestic water and per capita domestic electricity, etc.). ) and production efficiency (such as per capita GDP and land output rate, etc. ) .4. Coordinate objectives. Including social security (such as per capita insurance premium, unemployment rate, etc.). ), the degree of urban civilization (such as health compliance rate, the incidence of criminal cases, etc.). ) and sustainability (such as the proportion of environmental protection investment in GDP, the proportion of science and education investment in GDP, etc. ). Second, the basic points of China's urban sustainable development Study on China's urban sustainable development, we should not only consider the starting point, foundation, present situation and development trend of China's urban development according to the general law of urbanization, but also determine and grasp the basic points of urban sustainable development, so as to promote the sustainable development of Chinese cities. The basic point of China's urban sustainable development should include the motive force, key and soul of sustainable development. 1. Economy is the driving force to realize the sustainable development of cities. A city is a complex complex, and there are many factors affecting its development, including economy, politics, culture and military affairs. Among them, urban economy is an important factor that determines the formation and development of cities. Without the sustainable development of economy, there will be no sustainable development of cities. It can be seen that economy is the leading factor and powerful driving force for the sustainable development of modern cities. Circular economy is an important means of urban sustainable development. Circular economy is to guide the economic activities of human society with ecological laws. It reconstructs the economic system according to the law of material circulation and energy flow of natural ecosystem, which makes the urban economy change from the traditional mode of one-way flow of resources-products-pollution discharge in the industrial era to the mode of repeated circulation flow of resources-products-reproduction resources, which is conducive to changing from the current degenerate economic growth mode to the resource-based economic development mode that is harmless to the environment and provides an important means for realizing the sustainable development of urban economy. 2. Coordination is the key to urban sustainable development. The sustainable development of the city requires people to consider the current development of the city and protect the living space of future generations. Therefore, it is necessary to make the urban economy, urban construction, urban ecological environment, urban resources and other subsystems in the city form an internal coordinated development trend to meet the strategic needs of urban sustainable development. Coordinated development of urban economy and urban resources. Urban resources is a very broad concept, including natural resources and social resources. Because of the different geographical location and ecological environment of each city, there are differences in the types, reserves, distribution and available value of resources, which will also have a great impact on the development of urban economy. The development focus and industrial structure of urban economy are largely determined by the internal resources of the city. Therefore, the rational development and utilization of urban resources is the power source to promote urban economic growth. 3. Culture is the soul of urban sustainable development. City is the crystallization of material civilization and spiritual civilization of human society, the carrier of history and culture, and the cultural landscape of social economy. The city itself is a cultural phenomenon. In the construction of modern cities, protecting urban cultural heritage and developing advanced culture have become an important part of realizing urban sustainable development, and are also the basic points that must be paid attention to in building a sustainable city. Urban culture is the spiritual leader of urban sustainable development. Urban culture includes urban material culture and spiritual culture, and further concretization mainly refers to material civilization, institutional civilization, social civilization and spiritual civilization, especially the civilization of scientific and technological ideas and concepts of urban subjects. The sustainable development of cities is carried out under the command of urban culture, thus forming cities with different types, characteristics, development directions and trends. To study the sustainable development of cities, we must realize their sustainable development according to the different cultural characteristics of different cities.