The invention relates to an extraction technology of 
artemisinin, and belongs to the technical field of natural 
plant extraction. The extraction technology comprises the following steps: (1) 
drying raw materials: putting the raw materials in a 
drying facility to dry the raw materials; (2) primary preparation of 
artemisinin: putting the dried raw materials in an extraction tank, adding 
petroleum ether into the extraction tank, heating, carrying out 
reflux extraction, discharging the 
liquid extract from the extraction tank after the 
reflux extraction, allowing the 
liquid extract to stand still for a while, collecting the supernate, making the supernate go through a 
silica gel column, then washing the 
silica gel column by 
petroleum ether, collecting the fractions containing 
artemisinin, transferring the fractions to a condensing tank, condensing the fractions, transferring the condensed liquid to a 
crystallization tank when the liquid in the condensing tank start to crystallize, carrying out 
crystallization in the 
crystallization tank, filtering to obtain the crystals, and 
drying the crystals so as to obtain crude artemisinin; (3) artemisinin refinement: placing the crude artemisinin in an 
alcohol-
precipitation tank, dissolving the crude artemisinin by 
ethanol with a concentration of 85-95%, wherein the volume of the 
ethanol is 60 to 70 times of that of the crude artemisinin, allowing the solution to stand still for a while, collecting the supernate, subjecting the supernate to fine 
filtration, transferring the filtrate to a condensing tank, condensing the filtrate, allowing the condensed filtrate to stand still so as to carry out crystallization, filtering to obtain the crystals, and finally drying the crystals in vacuum so as to obtain refined artemisinin.