Abstract: Aims：Soil aggregates are the basic structure of soil. In order to reveal the distribution characteristics of soil aggregates and the response of their stability to long-term vegetation restoration in southwest Karst。 Method：The karst region and its succession transversal after ecological

Soil aggregates are the basic structure of soil. In order to reveal the distribution characteristics of soil aggregates and the response of their stability to long-term vegetation restoration in southwest Karst, the karst region and its succession transversal after ecological restoration in Caohai Nature Reserve, Weining, Guizhou, were taken as the research object and combined with the homogenous garden experiment. GLMM(Generalized linear mixture model) and structural equation model were used to analyze the mechanism of vegetation restoration on the stability of soil aggregates.