Abstract: This article takes the spatial planning system of Saudi Arabia as the research object, analyzes the main features of its planning system, and fnds that its planning administrative system is manifested as a centralized feature under the royal family, the planning law and regulation system fully reflects the influence of religion. Its fourlevel planning technology system of ‘National Spatial Strategy-Regional Plan-Local Plan-Land Subdivision Plan’ and its main content are similar to that of China. The national spatial strategy is the highest strategy to guide the development of the entire national space; the regional plan is the overall plan of 13 areas, which is more strategic; the local plan is the overall plan of the city, and the content is more implementation-oriented; the land subdivision plan is the construction layout of specifc plots, which is directly used to guide specifc construction actions. After analyzing the main contents of the four-level planning system, it is found that the feature of local planning is distinctive and the effect of implementation is good. Based on the analysis above, this article discusses its application in the territorial spatial planning of China at the city, county and township level.