Abstract: Korla fragrant pear was used as experimental material,the changes of the main components of epidermal wax were analyzed by gas chromatography-mass spectrometry,and the changes of fruit cell permeability,respiration rate,soluble pectin,cellulose content,polygalacturonan The changes of acid phosphatase and cellulase activity,and the relationship between the change of wax content and the changes of its chemical components and the changes of physiological indexes related to fruit were studied. The results showed that the postharvest refrigerated condition inhibited the decrease of wax content in pear. Pear wax was detected in the epidermis of the main components of alkanes,fatty acids,olefins,alcohols,aldehydes and esters. During the storage period,the contents of fatty acids and olefins increased gradually,while the alkanes,alcohols,aldehydes and esters decreased. Wax content and waxy components are related to the physiological changes of pear(p<0.05),in addition to respiratory strength,the impact of olefins on the physiological changes of the most significant(p<0.01),alcohol,fatty acids,aldehydes and wax content followed(p<0.05).