The invention discloses fingered citron beer and a brewing method thereof, and belongs to the field of fermented food. Barley malt and fingered citron juice are adopted as raw materials, and the fingered citron beer drink containing low-concentration alcohol is made through the technological processes of smashing, glycation, filtering, boiling, precipitation, filtering, cooling, fermentation and the like. The beer has the quality characteristics of conventional beer, and the fragrance of fingered citrons and polysaccharide, flavonoid, limonin and other matter of fingered citrons are given to the beer. The characteristic and variety of the beer are enriched, the trophic function of the beer is increased, and a new way is provided for development and utilization of fingered citron resources.