Abstract: This study aimed to explore the preservation technology suitable for custard apples storage. The fruits were gradient soaked for 1 min in three different coating materials: pullulan polysaccharides of 10, 20, 30 g/L, chitosan of 5,10, 15 g/L, and chitosan sulfate of 5, 10, 20 g/L. The fruits washed with distilled water were set as control（CK） and stored at 13 ℃ and 85% relative humidity. Respiration intensity, polyphenol oxidase（PPO） and peroxidase（POD） activities, soluble solid contents were measured every 3 days after the treatments, and fruit cracking rates and weight loss rates were also calculated. The results showed that the coating treatments of pullulan polysaccharides, chitosan and chitosan sulfate could delay the occurrence time of respiratory climacteric, effectively postpone the loss of carbohydrate and other nutrients, better maintain the moisture of fruits, reduce the fruit cracking rates, inhibit the increase of PPO activities and improve the POD activities at later stage of storage, which presented good storage and fresh-keeping effects. The optimal concentrations of these three coating materials were determined as follows: Pullulan polysaccharides of 20 g/L, chitosan of 5 g/L, chitosan sulfate of 20 g/L, respectively. After comprehensive analysis of various indices, it was found that the custard apples coated with 20 g/L chitosan sulfate exhibited the best preservation effects,and the appearance and taste after 12 days storage were not significantly different from that of fresh fruits. However,the practical applications still needed more experiments and exploration.