In recent years, with the continuous expansion and reconstruction of Nanjing city, the Ming city wall has been damaged and destroyed which greatly affects the image of Nanjing city. More and more scholars begin to focus on protecting Ming city wall. It has become a controversial issue how can wall protection in harmony with the surroundings and improve the urban spatial form of Nanjing city. This thesis mainly studies on Ming city wall on the basis of urban spatial morphology theory, aiming to give a new design proposal to Zhonghua segment wall in Qinhuai District in Nanjing city, making full use of the historical and cultural resources to create a comprehensive urban space close to Qinhuai River. For this purpose, urban spatial morphology theory is used as the literature theory to guide the design proposal. Methods and principles are concluded according to some local documents from the literature and books such as Thinking about Urban Form (Conzen, 1998) and the Image of the City (Lynch, 1960), as well as some Chinese articles. Lynch (1960) put forward five concepts in urban planning; they are paths, nodes, landmarks, edges and districts. In the design proposal, I will analyze the project area from these five aspects. And the principles which I concluded in the consideration of the current situation of Ming city wall are the main guidelines to conduct the proposal. By means of this thesis, it is hoped the restoration of Zhonghua segment wall can create some public urban space and improve surrounding urban form to some extents. Besides, some inspiration about wall protection and some planning approaches, as well as working principles might be useful for the further related study.