Objective: To establish a method for determination of total sugar and reducing sugar in processed Fructus Trichosanthis

and to detect and compare the content of sugars with the methods. Method: The content of total sugar and reducing sugar was determined by phenol-sulfuric acid method and 3

5-dinitrosalicylic acid (DNS) method

respectively. Result: The content of total sugar and reducing sugar was 16.17%-32.65% and 3.29%-13.29%

respectively

in 18 batches of processed Fructus Trichosanthis purchased from 15 provinces. Conclusion: These methods are easily operated and reliable. The content of total sugar and reducing sugar in processed Fructus Trichosanthis with good quality is above 25% and 9%

respectively. The content of total sugar and reducing sugar can explain the traditional opinion that Fructus Trichosanthis with higher sugar content is of better quality.