Toona sinensis extract and preparation method and application thereof

The invention discloses a preparation method of a toona sinensis extract. The preparation method comprises the steps that 1, a toona sinensis material is taken to be subjected to ultrasonic-assisted extraction in ethyl alcohol; 2, filter liquid is taken to evaporate ethyl alcohol, so that filter residue is obtained; 3, the filter residue is centrifuged, so that a toona sinensis crude extract is obtained, and distilled water is added to dilute the toona sinensis crude extract into toona sinensis extract diluted liquid for stand-by application; and 4, the toona sinensis extract diluted liquid ispurified. The toona sinensis extract prepared by adopting the preparation method, particularly a toona sinensis flower extract, can effectively reduce the activity of alpha-diastase and alpha-glucosidase in the body, reduces the blood sugar content in the body, and accordingly is the optical selection for preparing drugs or health care products for treating or relieving diabetes. 本发明公开种香椿提取物的制备方法，包括步骤1：取香椿材料在乙醇中超声波辅助提取；步