The invention discloses feijoa fruit wine and a preparation method thereof. The preparation method comprises the following steps of taking fresh feijoa fruits as raw materials, performing preprocessing, such as cleaning, crushing, color protection and beating; adding a small amount of complex enzyme preparation and active wine-making dry yeast, supplementing a small amount of sugar, using sulfurous acid or potassium sulfite to adjust pH, adjusting sugar degree to about 20 percent through pre-fermentation and filtration, adding compound clarifying agents, such as chitosan and gelatin to assist clarification and deastringency, and performing post fermentation; sampling, adjusting indexes, such as alcoholic strength, filtering by refined filtration devices, such as a centrifuging device and an ion exchanging device, continuously ageing, changing a tank, and ageing again for not less than 9 months; and finally, performing centrifugal ultra-filtration to obtain a product. A making process provided by the invention is simple and feasible, the obtained fruit wine is relatively natural, good in color and luster quality and good in mouthfeel and purity, has unique taste of the feijoa fruits, is rich in anthocyanin, and has antioxidant, anti-ageing and antimutation effects; and for a drinker, a drinking requirement of the drinker can be met, and the feijoa fruit wine has a health-care effect.