Anti-allergy and anti-pruritus composite plant extract, and preparation method and application thereof

The invention discloses a preparation method of an anti-allergy and anti-pruritus composite plant extract. The preparation method comprises the following steps of (1) taking panax notoginseng, adding water in the panax notoginseng, performing ultrasonic cell wall-breaking treatment for subsequent use, and pulverizing honeysuckle and chamomile for subsequent use; (2) uniformly mixing the panax notoginseng, the honeysuckle and the chamomile which are pretreated in the step (1), and adding cellulase and maltase to carry out enzymolysis so as to obtain enzymatic hydrolysate; and (3) extracting the enzymatic hydrolysate by using extracting solvent to obtain extracting solution, and performing follow-up treatment on the extracting solution to obtain the anti-allergy and anti-pruritus composite plant extract. The invention also discloses the anti-allergy and anti-pruritus composite plant extract prepared by the method. The composite plant extract is safe and non-irritant, and can be used for preparing anti-allergy and anti-pruritus medicines or cosmetics. The anti-allergy and anti-pruritus effect of the anti-allergy and anti-pruritus composite plant extract is obviously higher than that of a plant extract prepared by a traditional method.