The invention discloses a production process of Yu-flavor Baijiu.Wetted raw grain materials and steamed husks are evenly mixed and sufficiently steamed, the steamed mixture is mixed with mature mother distillers' grains in proportion, a liquor base is obtained through spread cooling, yeast adding, accumulating, sterilizing, fermenting and steaming, and a finished product can be packaged through cellar storing and blending.A modern scientific liquor brewing process is organically combined with a traditional liquor brewing process through the multi-grain, solid, steaming and burning process, Maotai flavor, strong flavor and faint flavor are organically harmonized, high-temperature yeast, high temperature accumulating, independent grain steaming, steaming and burning are conducted, liquor steaming is not conducted together with grain, white yeast is used in the saccharification and fermentation period, saccharification and fermentation are sequentially conducted, yeast for making hard liquor is processed at medium temperature, fermentation is achieved in a mud fermentation pit, yeast for making hard liquor is combined with the mud fermentation pit, and ethyl caproate is produced in a strong-flavor mud pool.The produced Baijiu has the advantages of being fine and smooth, plump, mild, pure, mellow, soft, harmonious, palatable and low in drunken degree and effectively meets the requirements of modern costumers for Baijiu.