Abstract:The extraction of polysaccharide of evodia with microwave-assisted method，the factors and levels were determined through single factor experiment.The effects of microwave power，extraction time，extraction times and material-liquid ratio on extraction rates of ERP were studied based on of single factor experiment with response surface methodology.The optimum conditions for the extraction polysaccharides of evodia were as follows：390 W of microwave power，101 s of extraction time，twice for extraction times and the material-liquid ratio of 103∶1（mL/g）.Under this condition，the model predictive and experimental value of evodia polysaccharides yield were 21.90%and 21.01%，respectively.The relative standard deviation was 4.06%.