The invention aims at providing a fen-
flavor liquor second-batch distiller grain refermentation technology. The refermentation liquor producing technology, namely, a resource reusing technology is performed on second-batch distiller grains by mixing mouldy
bran and fen-
flavor daqu. According to the fen-
flavor liquor second-batch distiller grain refermentation technology, 3% of white qu, 5% of black qu, 3% of the
yeast mouldy
bran and 2% of the fen-flavor daqu are adopted to referment the second-batch distiller grains, edible
alcohol is quantificationally added to improve the bouquet,
fermentation temperature changes follow the principles that the temperature is quickly risen in the early stage, the temperature is invariable in the middle stage, and the temperature is slowly lowered in the
late stage, the
fermentation cycle is 15 days, and the liquor yield can reach 24%-26%. The produced fen-flavor liquor is clear in bouquet, pure, pure sweet, soft, natural, harmonious and refreshing and clean in remaining taste, and can reach the level of superior liquor. Accordingly, a new method and way is supplied for improving company benefits and achieving resource reuse, and the important realistic significance is achieved.