Taking the quality homestays of Shanxi Province as an example, the spatial distribution characteristics of “Three families” in Shanxi Province was analyzed firstly , and then the factors affecting the spatial distribution of “Three families”was explored by using the spatial nearest proximity index, kernel density analysis, geographic concentration index and buffer analysis in ArcGIS spatial analysis method. The results show that: The distribution of “Three families” in Shanxi Province is agglomerative, with obvious imbalance. The "Three families" in Shanxi Province are distributed as a whole with multiple cores, forming three core groups in Xinzhou City and one core group in Yangquan, Jincheng and Linfen City respectively, with the density decreasing from the core to the outside. The factors affecting the spatial distribution of "Three families" in Shanxi Province include regional basic environment and tourism market environment. The analysis of these factors shows that the tourism market environment has the greatest influence on the distribution of “Three families”in Shanxi Province, followed by regional basic environment.