[Objective] To study the ultrasound-assisted extraction technology of polysaccharide from RADIX FLEMINGIAE PHILIPPINENSIS.[Method] The extraction process of polysaccharide from RADIX FLEMINGIAE PHILIPPINENSIS was optimized by single factor and orthogonal experiments.[Result] The optimal extraction process was as follows: extraction temperature 70 ℃,ultrasonic time 30 min,solid-liquid ratio 1∶40,extraction time of 2 h.[Conclusion] The extracting rate of polysaccharide was 0.37% under the optimal extraction p...