Objective: To establish a simple and accurate method for the analysis of main active components in longan. Methods: An analytical method based on ultraviolet spectrophotometry was established to measure the content of total sugar

total flavonoids

and total polyphenols in Luzhou longan wine. Results: An analytical method for the main active ingredients in longan was successfully established based on ultraviolet spectrophotometer. The regression equations of major components had R

2

values greater than 0.999

indicating that the linear fitting of each component was reliable. The precision values expressed as relative standard deviation were less than 2%

and the recoveries were 80%～120%

which met the requirements of analysis. The content of main ingredients in longan wine was successfully determined by this method. The total sugar content of Y-3

Y-4

Y-5

and Y-6 was 20.94

49.01

39.70

and 47.61 mg/mL

respectively. The total polyphenol content of Y-3

Y-4

Y-5

and Y-6 was 0.597

0.291

0.473

and 0.555 mg/mL

respectively. The total flavonoid content of Y-3

Y-4

Y-5

and Y-6 was 69.58

50.41

292.92

and 387.45 μg/mL

respectively. Conclusion: This method can be used for determination of the main components in longan.