In order to improve the sensory quality after drying of gastrodia elata in this work,the effects of colorprotecting reagents such as xanthan gum,potassium sorbate,vitamin C,citric acid and EDTA,which were used during the drying process of Dabie Mountains Gastrodia elata,were explored by uniform design method. A polynomial model describing the correlation between the indicator and the four variables was obtained,and the model could be used to predict the relevant indicators in practical applications. The res...