Water-soluble dietary fiber-phenolic substance structural body and processing method thereof

The invention belongs to the field of functional food processing, and particularly relates to a water-soluble dietary fiber-phenolic substance structural body and a processing method thereof. The method comprises the following steps: performing airflow type crushing and screening on grain particles to obtain a skin product; the skin product and water are mixed to be uniform according to the weight ratio of 1: (20-200), compound enzyme is added to obtain a mixed system, the mass fraction of the compound enzyme in the mixed system is 0.1%-8%, and the compound enzyme is obtained by compounding heat-resistant alpha-amylase, saccharifying enzyme, alkaline protease and cellulase according to the mass ratio of 1: (0.1-5): (0.5-5): (0.1-10); placing the mixed system in a physical field at 40-80 DEG C for assisting a reaction for 0.2-10 hours, after the reaction is finished, performing fractional precipitation by using an ethanol aqueous solution with the volume fraction of 60%-95%, and drying the precipitate to obtai