Abstract:The interspecific relationship is one of the important quantitative and structural characteristics of plant communities, which directly affects the stability of communities, and it is of great significance to study the interspecific relationship and community stability for the protection and stability of plant population. Alsophila spinulosa community in Chishui National Nature Reserve of Guizhou Province was investigated by means of sample method, and the overall correlation and interspecific correlation of plants were analyzed and the stability coefficient of the community was calculated. The results showed that Phyllostachys edulis was dominant species in the community, and the interspecific relationship between P. edulis and A. spinulosa showed a significant positive correlation. Alsophila spinulosa was greatly affected by interspecies at the early development stage, but was relatively independent state at the late development stage, showing weak or no correlation with other species, and was less affected by interspecies. The contribution law analysis showed that the stability coefficient of P. edulis-A. spinulosa community was 21/79, indicating that the community was stable in Jinshagou area.