Abstract: Under the background of rural and urban integration development, based on the CiteSpace knowledge map analysis software, this paper makes a visual analysis of the main content structure and evolution trend of China's urban-rural settlement system in county territory. These results demonstrate as follow. The research hotspot of settlement system in county territory has experienced the evolution from the urban system in the urbanization period to the rural settlement system in the rural revitalization period, and then to the urban-rural settlement system in the urban-rural integration period. The main research contents can be summarized as three aspects: spatial structure, spatio-temporal pattern evolution, and spatial optimization and planning. The study found that the mainstream research paradigm of the urban-rural settlement system in county territory is 'spatial patternevolution-mechanism-optimization'. There are still problems such as differentiation of urban and rural settlements, incomplete settlement coverage and insufficient dynamic research at the present stage. In the future, this research will develop in the directions including diversification and complexity of theoretical methods of settlement system, integration of urban and rural settlements, and open and dynamic research perspective.