Abstract:The content of organic acids in mangoes with different maturity was tested by acid-base titration.The effect of mango fruits on digestion was determined through intestinal movement experiment of mice and feeding experiment of rats.The results showed that the organic acids of tender fruit，green-ripe fruit and ripe fruit were 1.02%，1.63% and 0.12% respectively.The ripe fruit had not significant effect on digestion function，but the tender fruit and green-ripe fruits both improved the digestive function of experimental animals significantly，and the latter was the best.For the green-ripe fruit compatible with gardenia and mango leaves，not only the gastrointestinal motility，gastric juice volume and pepsin output were improved，but also the toal weight gain and food utilization rate were increased significantly.