Insoluble dietary fiber as well as extraction method and application thereof

The invention relates to the field of deep processing of agricultural and sideline products, and discloses an insoluble dietary fiber as well as an extraction method and application thereof. The extraction method of the insoluble dietary fiber provided by the invention comprises the following steps: crushing a raw material containing the insoluble dietary fiber to obtain a powdery raw material; mixing the powdery raw material with water and cellulase to obtain a treatment solution; performing ultrasonic treatment on the treatment liquid under the shearing action to obtain enzymatic hydrolysate; and carrying out solid-liquid separation on the enzymatic hydrolysate, collecting the precipitate, and drying to obtain the insoluble dietary fiber. According to the method provided by the invention, an ultrasonic-assisted enzyme method under the shearing action is adopted, so that the activity of the insoluble dietary fibers can be enhanced. 本发明涉及农副产品深加工领域，公开了一种不溶性膳食纤维及其提取方法和应用。本发明提供的不溶性膳食纤维的提取方法，包括如下步骤：将含有不溶性膳食纤维的原料粉