In order to investigate the fresh-keeping effect of PCL modified atmosphere packaging film on spinach. The effects of unpacked, LDPE film（control）and PCL film packaging treatments on postharvest quality of spinach during storage at 4 ℃ were studied. The results indicated that compared with the control group of unpacked both of the packaging films could improve the postharvest quality of the spinach, and PCL packaging treatment group could be better in the development of initial atmosphere suitable for the storage of spinach. Moreover, PCL film was better in delaying the increase of weight loss ratio and inhibiting the degradation of chlorophyll and reduce its yellowing. In addition, it was found to be effective to inhibit the accumulation of malondialdehyde content and retard the postharvest senescence. Furthermore, it also could help to maintain the better sensory quality of spinach.