Effects of different pH of CMC coating on postharvest physiological index and storage quality of Shaanxi Lintong sweet pomegranate fruit were studied.The results showed that pomegranate fruit stored at(4.0±0.5)℃ with treatment of pH 5.0,0.5% CMC coating could maintain the soluble solids content,total sugar content and titratable acidity of arils effectively.It could also slow down the rise of the relative conductive rate and browning index of skin,reduce the fruit respiration intensity and rotten rate,inhibit the activities of ascorbic acid oxidase(AAO) and polypenoloxidase(PPO),keep peroxidase(POD) activity at a relative high level.After 120 days of storage,pomegranate fruit still had a good appearance.Its sensory quality was favorable and is idea for fresh-keeping.