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Carrying out research on regional territory space pattern change, exploring its evolution regularity and differentiation and revealing the coupling mechanism between the quantitative structure and spatial pattern of territory space have guiding significance for promoting the orderly, appropriate and sustainable development and utilization of territory space. Taking the plateau mountainous citythe urban agglomeration in the central Yunnan as an example, and selecting the land use data in 2000, 2005, 2009 and 2015 and DEM data as the basic data source, from the aspects of quantitative structure and spatial layout to analyze the characteristics of territory space pattern change of the urban agglomeration in the central Yunnan at four time points., revealing the spatiotemporal evolution and differentiation of the territory space pattern. The results showed that the topographical features of the plateau mountainous areas affected the distribution of the territory space pattern of the urban agglomerations in central Yunnan, and the vertical differences characteristics were significant. The ecological space was the absolute main body of the territory space type in the urban agglomeration, and the production and living space were mainly distributed in the east of the central part of the study area. In the past 15 years, the spatial change of the production-living-ecological space was accelerated and the regional differences were obvious. The production and living space area were gradually increased, and the ecological space continued to be decreased, showing an overall situation of “break the pale”. The mutual transformation of ecological and production space area constituted the main type of evolution of the territory space pattern. The territory space use degree was increased year by year, and the hotspots of territory space use degree were mainly concentrated in some areas in the central and eastern parts of the study area. At four time points, the territory space pattern in the study area was generally distributed along the northeastsouthwest direction. The distribution of production and living space in the northeast was the most concentrated, and the ecological space pattern was more random. The spatial distribution characteristics of kernel density in production and living space were characterized by high density in the central, western and northeastern regions, and low in the south, southwest and northwest, and multinuclear diffusion and fragmentation. The spatial distribution characteristics of the calculated values of the kernel density of the ecological space were relatively dense in the east of the central part of the urban agglomeration, and disturbed by human activities, with severe fragmentation and uneven distribution. The development strategy of the western region and the implementation of the corresponding land policy made the territory space structure of the urban agglomerations in central Yunnan a significant change.