In order to provide a theoretical reference for the further research and development and application of Cerasus humilis, the contents of phenols in different parts of fruits at different ripening stages were comparatively studied in 3 different resource types of fruits, i.e. red skin and red flesh, red skin and yellow flesh, yellow skin and yellow flesh C. humilis. The results showed that the total phenolic, total flavonoid, proanthocyanidin, anthocyanidin and flavonol contents in the peel, flesh and fruit of the three C. humilis resource types were generally higher in the hard ripening stage than in the finish ripening stage, and the phenolic contents in the type of red skin and red flesh at the hard ripening stage were 124.95, 30.21, 99.39, 264.28 and 6.93 mg·100 g^-1 higher than those at the finish ripening stage, respectively. In different parts of the fruits, all three types of plums showed the highest phenolic content in the peel, except for C. humilis, which had the highest total phenolic content in the flesh. The contents of total phenolic, total flavonoid, proanthocyanidin, anthocyanidin and flavonol contents in the type of red skin and red flesh were 471.99, 48.19, 75.42, 111.33 and 3.79 mg·100 g^-1 more in the skin than those in the flesh, respectively. The above results showed that all the different C. humilis resource types exhibit a higher phenolic content in the hard-ripening fruit than in the finish-ripening fruit, and most C. humilis resource types have a higher phenolic content in the peel than in the flesh, with the peel being the main distribution and accumulation site of phenolic substances in the fruit.