The invention discloses a processing method of a banana wine. The method includes the following steps: cleaning banana, peeling, slicing, protecting color, juicing, treating with pectinase, centrifuging and separating, adjusting the components, inoculating yeast, conducting primary fermentation, primary fermentation after fermentation, ageing, filtering, bottling, sterilizing and obtaining a finished product. The method uses bananas as raw materials for brewing banana wine, which has pale yellow, clear and transparent color, luster, and no suspended solids or sediment; the banana wine has evident banana aroma and bouquet, rich mellow, harmonious aroma, pure taste, full and mellow body, sour-sweet taste and unique style. The wine with unique style is rich in nutrients, protein and a variety of amino acids and minerals, and is in line with the development direction of domestic and international low alcohol fruit juice wine. At the same time, the development of banana wine opens a new way for deep processing of local agricultural and sideline products, not only solves the issue of sales of banana, but also can increase the added values, and promote economic and social development.