Method for extracting triptolide from tripterygium wilfordii

The invention relates to the technical field of natural medicinal chemistry, and particularly discloses a method for extracting triptolide from tripterygium wilfordii, and the method for extracting triptolide from tripterygium wilfordii comprises the following steps: S1, adding tripterygium wilfordii powder and compound enzyme into water for enzymolysis to obtain tripterygium wilfordii slurry; s2, adding an ionic liquid microemulsion into the tripterygium wilfordii slurry, performing ultrasonic treatment, and centrifugally collecting an extracting solution; s3, firstly filtering the extracting solution by using a nano-membrane, then homogenizing filtrate, and finally filtering and intercepting by using an ultrafiltration membrane to obtain dialysate; s4, adding the dialysate into a solvent for extraction, collecting an organic phase, and carrying out vacuum concentration until the organic phase is dry, so as to obtain a crude product; s5, the crude product is added into ethyl acetate, then silica gel column c