Abstract: The quantitative grading standard was studied for 32 theratened medicinal plants in Jiangxi on field survey and information collection."The coefficient of endangerment"and "The value of protection emergency"calculated by the standard quantification and weight allocation,were used to assess the states of medicinal plant endangered and the sequences of emergent protection demand for these medicinal plants.In indicated that the quantitative grading method was more objective than the current qualitative one in reflecting the real endangered situation of the 32 medicinal plants.