NOVELTY - Extracting glycyrrhizic acid and liquorice flavonoid via continuous reflux ultrasonic extraction machine involves 1) inputting the processed liquorice and extracting solvent in the extracting tube via ultrasonic extraction machine; 2) heating liquorice and extracting solvent; 3) discharging the liquorice residue from the ultrasonic extraction machine; 4) separating extracting liquid obtained in the step 3) into the residue and liquid followed by and concentrating the liquid; and 5) separating the liquid followed by concentrating and drying the liquid.    USE - For extracting glycyrrhizic acid and liquorice flavonoid via continuous reflux ultrasonic extraction machine (claimed).    ADVANTAGE - The process is carried out in normal pressure and a condition of hermetic seal, such that the obtained product has excellent quality; and has the extracting speed of less than 40 minutes, therefore the extracting efficiency is high, and the yield of the extract is high i.e. greater than or equal to 90%; reduces the consumption of the solvent i.e. the loss amount of the solvent is less than 1%, and hence the production cost is less; and reduces the pollution to the environment.    DETAILED DESCRIPTION - Extracting glycyrrhizic acid and liquorice flavonoid via continuous reflux ultrasonic extraction machine involves 1) inputting the liquorice, removing impurity and crushing into 10-30 meshes in the feeding device of the continuous reflux ultrasonic extraction machine via a fixed amount feeder, inputting the processed liquorice into the extracting tube via the feeding port (where the ratio of the weight (kg) and the volume (l) of the liquorice and the extracting solvent is 1:4-10), and inputting the extracting solvent to the extracting tube via the residue discharging end of the ultrasonic extraction machine; 2) heating liquorice and extracting solvent in the extracting tube for 20-40 minutes at 30-60 degrees C and normal pressure; 3) discharging the liquorice residue from the residue discharging end of the ultrasonic extraction machine, processing the liquorice residue and recovering the solvent, and discharging the extracting liquid from the liquid discharge port of the ultrasonic extraction machine; 4) separating the extracting liquid obtained in the step 3) into the residue and liquid and concentrating the liquid for 20-40% via a concentrating pot to obtain the concentrated liquid; and 5) separating the concentrated liquid obtained in the step 4) into the solid and liquid, inputting the solid in a drier and drying the solid to obtain the liquorice flavonoid product, inputting the liquid in an aid adjusting mixer and using the inorganic acid for adjusting the pH of the separated liquid as 2-3 and separating to obtain the solid and the liquid, drying the solid to obtain the glycyrrhizic acid product, and concentrating the liquid, drying to obtain the mixture of the liquorice polysaccharide, liquorice flavonoid and glycyrrhizic acid.