Abstract:The impact of ultrasound combined with calcium impregnation on the phenolics（content，structure，and antioxidant capacity）and the activity of enzymes related to phenolics metabolism during the postharvest storage of cherry tomato was investigated. The combined treatment with ultrasound and calcium impregnation effectively inhibited the activities of polyphenol oxidase，peroxidase and phenylalanine ammonia-lyase in cherry tomatoes during the postharvest storage but maintained the phenolics content，thus resulting in delayed ripening. Mass spectrometry further revealed that the combined treatment effectively inhibited the depletion of the main phenolic acids in cherry tomatoes during the postharvest storage，thereby protecting their structural properties and antioxidant capacity. Altogether，combined treatment with ultrasound and calcium impregnation can effectively maintain the quality and delay the ripening of cherry tomatoes during postharvest storage.