Considering the particularity of the living environment in the pastoral areas of Inner Mongolia, revealing the characteristics of the pastoral living environment by region based on suitability evaluation has theoretical and practical value for ensuring the regional, characteristic, and targeted construction of pastoral living space. This study, based on the intermechanism of the five elements of the living environment in pastoral areas, constructs a suitability evaluation system for the pastoral living environment and uses spatial autocorrelation analysis to analyze the regional differences in each dimension. Finally, a two-dimensional graph theory clustering algorithm is applied to achieve a reasonable suitability zoning. The research shows: (1) The suitability of the living environment in Inner Mongolia"s pastoral areas shows an overall trend of being higher in the east and lower in the west, with better suitability areas often concentrated in areas with dense populations and well-developed facilities, while areas with poor suitability are mostly distributed in the northern areas of the Yin Mountains with poor location conditions. (2) The suitability of the living environment in each dimension of Alxa League is poor, Ordos City has high suitability in social, residential, and support systems, but poor ecological and living environments, Chifeng City, Tongliao City, and other regions have significantly higher suitability in each dimension of the living environment compared to other areas, and the suitability of the living environment in each dimension in the northern areas of the Yin Mountains, such as Xilingol League, Bayannur City, Baotou City, etc., has conflicts. (3) Considering the results of spatial autocorrelation analysis and the overall geographical environment of Inner Mongolia Autonomous Region, 14 living environment suitability zones are ultimately determined. This paper, following the research path of suitability evaluation - difference analysis - two-dimensional graph theory clustering, reveals the distribution characteristics of the suitability of the living environment in Inner Mongolia"s pastoral areas in a full sample and constructs a reasonable zoning, providing support for the high-quality development of the pastoral living environment.