Abstract: The results of healthy analysis of desert vegetation degenerating in Minqin show: based on the method of fuzzy differentiation in healthy analysis, the method can be not only used in the healthy analysis of vegetation, but also in the healthy sequence analysis of degenerated vegetation. Index selected is the key factor to influence the results. It is capable to analysis the natural characteristics of desert vegetation degenerating by dividing the index selected into two-types in dominant species (or shrub) and auxiliary species (or herbage), meanwhile to accurately show the affect factors to vegetation community by first grade analysis standard on the healthy of dominant species and companion species. The analysis result shows: the healthy is better in the same community at comparing to on moving dune or semi-moving dune and fixing dune. The healthy of dominant species obviously influence the health of community. The sensitivity analysis either check up the accurate of analysis consequence or direct what objects that are substituted by analysis standard act the function and status.