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Using reducing sugar yield as index, the effect of hydrolysis time, hydrolysis temperature and sulfu­ric acid concentration on jujube polysaccharide hydrolysis was studied. Based on single factor test, orthogonal test was used to optimize the jujube polysaccharide hydrolysis conditions. Then the hygroscopicity, moisture retention of hydrolysis product were studied. And the correlation between the reducing sugar content of hydrol­ ysis product and its hygroscopicity and moisture retention was investigated. The results showed that the optimi­zation conditions of jujube polysaccharide hydrolysis were as follows: hydrolysis time 120 min, hydrolysis tem­perature 70 °C , sulfuric acid concentration 0. 15 mol/L. Under this condition, the reducing sugar yield was 97.56%. The jujube polysaccharide hydrolysis products had good hygroscopicity and moisture retention, no significant difference than that of glycerol in the same conditions. The hygroscopicity and moisture retention of hydrolysis product had positively linear correlation with reducing sugar content, and the linear correlation coef­ficient were 0. 905 and 0. 919, respectively. The jujube polysaccharide hydrolysis products had a good applica­ tion prospect in the field of food and cosmetics production. [ABSTRACT FROM AUTHOR]