Brown rice enzyme as well as preparation method and application thereof

The invention belongs to the technical field of fermentation, and particularly provides a brown rice enzyme which comprises rice milk, a complex enzyme preparation and a complex microbial inoculant, the rice milk comprises brown rice and water in a mass ratio of 1: 4; based on the mass of brown rice, the compound enzyme preparation comprises high-temperature amylase with the enzyme activity of 180-220 u/g and glucoamylase with the enzyme activity of 280-320 u/g; the complex microbial inoculants comprise 1% of acetic acid bacteria, 0.8% of saccharomycetes and 1.2% of lactic acid bacteria according to the mass of the rice milk. The invention also provides a preparation method of the brown rice enzyme, the germinated brown rice is subjected to enzymolysis and fermentation by adopting a complex enzyme preparation and a complex microbial inoculant, and the obtained brown rice enzyme is rich in functional components such as vitamin B1, vitamin B2, glucaric acid-1, 4-lactone (DSL) and gamma-aminobutyric acid, so tha