Yanji is the capital of Yanbian Korean Autonomous Prefecture.It is the center of economic,political,transportation,culture,education and science and technology in the whole state.It is a new industry,trade,culture and education,and a tourist city.Yanji has both the ancient culture and the young development.It is an open city along the Yangtze River which contains national characteristics and modern customs.From the initial formation of Yanji,the city construction in the Japanese colonial period,the establishment of the early founding of the founding of the people's Republic of China,the revision of the first urban overall planning and the urban construction in twenty-first Century,the development process of the city of Yanji is analyzed,and the history of the urban development of Yanji is kept by the exploration of the development of the urban planning in the past.It provides a theoretical basis for the future development.