Abstract:Agaricus bisporus is commonly preferred because of its delicious taste and high nutritional value，but it is prone to browning，cap opening，and softening of fruiting bodies，resulting in loss of commodity value.Therefore，it is particularly important to develop an appropriate fresh-keeping method for A.bisporus.In this study，a combined-coating group（konjac gum+carrageenan），an antibacterial combined-coating group[konjac gum+carrageenan+nisin+ε-polylysine（ε-PL）]，and a control group（distilled water）were set up to observe the effects of different treatments on postharvest storage quality and antioxidant capacity of A.bisporus.The results showed that A.bisporus in the antibacterial combined-coating group did not rot during six days of storage，and the overall storage quality was superior to that in the other two groups.Moreover，the cap opening rate，respiration rate，water loss，polyphenol oxidase activity，the decline rate of hardness，and the decline degree of soluble protein were all lower than those in the other two groups.Furthermore，the antibacterial combinedcoating treatment also significantly enhanced the activities of antioxidant enzymes in vivo and reduced malondialdehyde accumulation.The findings of this study indicated that the antibacterial combined-coating treatment contributed to the postharvest storage quality retention of A.bisporus.