The invention discloses a method for extracting ursolic acid from red jujubes, and is characterized in that the method comprises the following steps: cleaning and drying red jujubes, pulverizing the red jujubes, weighing red jujube dry powder, adding an ethanol aqueous solution with an amount of 20 times of the weight of the red jujubes as an extraction solvent; then, transferring the solution into a microwave reactor with a microwave control temperature being set at 60-80 DEG C, power of 200-400 W, microwave action time of 80-100 s, cooling, repeating the operations of microwave reaction and cooling for 1-10 cycles, centrifuging the extract, performing reduced-pressure filtration of the supernatant, collecting the filtrate, performing reduced-pressure distillation to obtain an ursolic acid extractum; finally, washing the extractum with distilled water and petroleum ether, filtering, dissolving the extractum with anhydrous ethanol, adding active carbon for decoloration, performing recrystallization, performing suction filtration to obtain the ursolic acid extract. The extraction method of the invention has high extraction efficiency, and the ursolic acid extract obtained by the extraction method of the invention has high product purity.