Cinnamon leaf residue extract as well as preparation method and application thereof

The invention belongs to the technical field of natural extracts and discloses a cinnamon leaf residue extract as well as a preparation method and application thereof. The preparation method comprises the following steps of: crushing cinnamon leaf residues after volatile oil is extracted, and screening to obtain cinnamon leaf residue powder; adding ethanol for reflux extraction, wherein the volume fraction of the ethanol is 60-90%, the solid-liquid ratio of the cinnamon leaf residue powder to the ethanol is (1: 8) - (1: 40), and the temperature of reflux extraction is 50-90 DEG C; performing reduced pressure rotary evaporation concentration on the extracting solution, wherein the temperature of reduced pressure rotary evaporation concentration is 35-50 DEG C; and performing freeze drying, thereby obtaining the cinnamon leaf residue extract. The cinnamon leaf residue extract prepared by the invention has high antioxidant activity, anti-aging activity and anti-inflammatory activity and can be used for preparing