Objective Polysaccharides (LBP) was extracted from Glycyrrhiza inflata Bat.by ultrasonic method, and the content was determined. Methods Polysaccharides was determined by spectrophotometer. Results The content of polysaccharides was 3.26% by ultrasonic method, which was 36.0% higher than that of extracted by traditional method.Conclusion Ultrasonic extraction was a better method for polysaccharides extracted of Glycyrrhiza inflata Bat..