Abstract: 15 representative parks and 46 typical quadrats were selected from Taiyuan city. M-Godron method was used to determine the stability of selected quadrats. The result of stability was basically consistent with the actual status of Taiyuan city, which showed that the selected stability calculation method was feasible. It could be seen from the results that the stability was closely related to the species richness of the community. The plot with higher stability had higher species richness, and vice versa. The change patterns of both were basically identical. The ratio of shrubs to trees was close to 6:1 in the plots with higher stability, but the ratio was far away from 6:1 in the plots with lower stability. No. 19 (Xuefu park) and No. 27 (Taiyuan forest park) were relatively stable. The plant communities in these two plots were trees, shrubs and grasses, with richer species, with abundant plant species in each layer and reasonable density of plane layout. The community spatial structure of No. 25 (Xihaizi park) and No. 38 (Yuquanshan forest park) quadrats was only trees and herbs, and lacked shrub layer, with lower community richness, serious imbalance of trees and shrubs ratio, higher disturbance of tourists, lower maintenance frequency, lower overall stability of the plots. In summary, in order to ensure the stability of urban park green space community, besides the development and evolution of plant community, appropriate and reasonable artificial management and maintenance were also needed.