The invention discloses a method for extracting and purifying phenolic acids and flavonoids from stems and leaves of radix salviae miltiorrhizae. The method includes the steps of extraction, preparation of a loading solution and purification of a macroporous adsorption resin column spectrum. The method includes the specific steps of pulverizing and sieving the stems and leaves of radix salviae miltiorrhizae, adding 8-fold volume of 50% ethanol, performing reflux extraction 3 times, each time for 1 hour, performing filtering, combining the filtrates to obtain an extract; performing vacuum concentration on the extract to make the concentration be 1.0 g.ml<-1>, that is, obtaining the loading solution; causing the loading solution to undergo adsorption through AB-8 type macropores, using 3-4BVwater to perform purification, and using 3BV 40% (v/v) ethyl alcohol for elution; and performing drying under reduced pressure to powder or extract. According to the method for extracting and purifying phenolic acids and flavonoids from stems and leaves of radix salviae miltiorrhizae, an optimal process is obtained through plenty of experimental screening, the economic value of the stems and leaves of radix salviae miltiorrhizae can be improved, and the method not only has the environmental value of turning waste into treasure, but also has very good application prospects.