Abstract:Banana vinegar was prepared from banana wine with 4%vol～5%vol alcohol by immobilized fermentation.The main components were analyzed.The results showed that in the fermentation process of banana vinegar，with the increase of fermentation time，the pH and alcohol decreased，total acid increased，the light transmittance increased rapidly.Then fluctuated and tended to be stable，protein and browning decreased，then tended to be stable.Soluble solid increased and tended to be stable，total sugar and reducing sugar increased，then decreased.Reducing sugar changed later than total sugar；polyphenol decreased，then increased.The total flavone showed a downward trend.The total amino acids increased，then decreased，the highest was alanine.Organic acids increased，the main organic acids were acetic acid，succinic acid，lactic acid and citric acid ，and the changes of acetic acid and lactic acid were the most obvious. The physical and chemical indicators of banana vinegar by immobilized fermentation were pH 3.55，total acid 3.80 g/100 mL，browning 0.72，light transmittance 91.13%，soluble solid 4.80%，protein 5.10 mg/100 g，total sugar 0.74 g/100 g，reducing sugar 0.09 g/100 g，polyphenol 9.02 mg/100 mL，total flavone 6.99 mg/100 mL，total amino acids 115.00 mg/100 mL，organic acids 36.31 g/L.