TECHNOLOGY FOCUS - PHARMACEUTICALS - Preferred Method: The extraction is alcohol extraction comprising taking out green forsythoside, adding 50-70% ethanol (5-10 times) to perform reflow extraction for 2-3 times (2-3 hours each), filtering using a screen of 200-300 meshes, and concentrating at less than or equal to 60 degrees C to include the concentrated liquid with the raw medicine amount of 0.1-0.5 (preferably 0.3-0.5) g/ml. The alcohol precipitation comprises adding ethanol into the concentrated liquid, mixing and placing them still, sucking the upper clear liquid, and concentrating in a depressurization way. The addition amount of the ethanol is that the alcohol content of the upper clear liquid is 25-35%. The concentrated liquid is coated with the resin column and with polyamide column to separate it. The resin separation comprises adding hydrochloric acid into the concentrated liquid to adjust the pH value to 1-2, coating the AB-8 (RTM: Macropore adsorptive resin) column and washing using the water, discarding the water-washed liquid, using 30% ethanol to perform the washing using a volume of 6-10 times, collecting the washed liquid, and concentrating at less than or equal to 60 degrees C until there is no alcohol smell. The polyamide column separation comprises coating the polyamide column on the concentrated liquid after the resin separation; washing using the water and discarding the water-washed liquid; adding 20% ethanol to perform the washing using a volume of 4-8 times; collecting the washed liquid; and concentrating at less than or equal to 60 degrees C until there is no alcohol smell. The purification comprises coating the inversed resin column on the concentrated liquid after the polyamide column separation, discarding the liquid below the column, and washing using 10-15% ethanol, and collecting the solution behind the yellow color tape. The enrichment comprises coating AB-8 (RTM: Macropore adsorptive resin) column on the solution after the color tape, discarding the liquid below the column, washing using 10-15% ethanol solution, collecting the alcohol-washed liquid, and concentrating in a depressurization way to be dried. The resin is pre-processed by immersing using ethanol for 24 hours, performing wet column packaging, washing out the grease in the resin using the ethanol, and washing using the water until there is no alcohol smell.