Abstract: The content of sugar and acid in apple and hawthorn before and after dehydration was determined. The results showed that total content of sugar and acid of apple and hawthorn increased distinctly after dehydration and the pattern of sugar content varied with different kinds of sugar, thd citric acid content of haw thorn increased greatly after dehydration and the content of malic acid showed differently according to its mature degree.

Key words:  Apple Hawthorn &rsquo, Dehydration Sugar Acid；