Objective:To select the optimum microwave extracting conditions for polysaccharide.Method: Based on the design of the orthogonal experimental

the optimum extracting conditions for polysaccharide were optimized.The content of polysaccharide was detected by phenol-sulfuric acid

and the structure of polysaccharide was analyzed by infrared spectrum.Result: The results show that the optimum microwave extraction conditions are 390 W power

1∶20 liquid material ratio

6 min for 2 times.Under these operating conditions

the polysaccharide content is 14.82%

which is obviously higher than 10.26% obtained by the traditional method.Infrared analysis showed that the structure of polysaccharide from microwave extraction is basically the same as the traditional method.The microwave method is reasonable for the extraction total polysaccharide in the Sijunzi decoctin and it has the advantages of the high efficiency and save time.Conclusion: The microwave extraction can save time

and has higher efficiency than the traditional method.It was reasonable for total polysaccharides of Sijunzi decoctin.