The invention provides a novel high gamma-aminobutyric acid, high flavone fragrant black glutinous germinating brown rice and preparation thereof. The germinating brown rice is produced from material of long-shaped fragrant glutinous black rice, which has gamma-aminobutyric content 89mg/100g, flavone content 8603mg/kg, and protein content 12.4%, wherein the content of amino acid and mineral substances is 3-5 times higher then the ordinary rice. The preparation includes material selecting, husk sieving, sterilizing, cleaning, immersing, sprouting, cleaning, terminating activity of enzyme, microwave drying, checking. The germinating brown rice has thick fragrance of popcorn, great mouth feeling, high content of gamma-aminobutyric acid, flavone and protein, high content of amino acid and mineral, high nutrition value. The germinating brown rice has reasonable materials, easy processing, enhances quality of germinating brown rice, prolongs storage period of the product, has obvious economic value, and provides technological guarantee to popularization of the germinating brown rice as a functional food.