NOVELTY - The method comprises drying Artemisia annua leaf at a shade place for 3-15 hours, removing moisture from the dried Artemisia annua leaf, crushing the dried Artemisia annua leaf into crude powder, putting the Artemisia annua leaf crude powder into a round bottom flask, adding 20% organic solvent into the crude powder to extract, filtering the mixture at 75-95 degrees C, recovering the solvent, stewing the solvent for 10-30 minutes, filtering the mixture, hot melting the solvent by 70% of ethanol, and adding 2.5% of active carbon to decolor.    USE - The method is useful for extracting artemisinin from Artemisia annua, which is useful for treating cold, fever, malaria and jaundice. No biological data given.    ADVANTAGE - The method ensures simple, rapid and economic extraction of the artemisinin from Artemisia annua with high purity and quality, improved stability and reduced solvent consumption.    DETAILED DESCRIPTION - The method comprises drying Artemisia annua leaf at a shade place for 3-15 hours, removing moisture from the dried Artemisia annua leaf, crushing the dried Artemisia annua leaf into crude powder, putting the Artemisia annua leaf crude powder into a round bottom flask, adding 20% organic solvent into the crude powder to extract, filtering the mixture at 75-95 degrees C, recovering the solvent, stewing the solvent for 10-30 minutes, filtering the mixture, hot melting the solvent by 70% of ethanol, adding 2.5% of active carbon to decolor, filtering the mixture, concentrating the filtrate, separating out the crystal to obtain the crude product, taking crude product, adding 70% of ethanol into the crude product to hot melt, stewing and separating out the product, dissolving the product into water, adjusting pH value of 6.5-8.5 by triethylamine, layering the dissolved product by processed D201 macroporous resin chromatography, eluting the product by 10-30% of ethanol solution, concentrating ethanol eluent until the solid content is 80-90%, diluting the eluent by 3-5 fold of distilled water, layering the mixture by weak base anion exchange resin C100E column chromatography, eluting the mixture using 1 mol/l of ammonia elution, concentrating and crystallizing the product, and drying the concentrated product to obtain the artemisinin product with high purity. The organic solvent is gasoline. The organic solvent extraction is reflux extraction or pressurizing cold circulation extraction. The reflux extraction is carried out for 0.5-2.4 hours for 4 times. The pressurizing cold circulation extraction is carried out for 3.5-7.5 hours for 3 times. A mass ratio of Artemisia annua leaf and the organic solvent is 1:2-1:10.