Abstract:In order to find a way to improve of egg quality during storage and prolong the shelf life of eggs，a new method of coating preservation was put forward.The effect of three factors including PLA content，dissolution temperature and glycerol addition on the PLA coating fresh-keeping effect of eggs were studied in this experiment.The production process of PLA coating agent was as follows：PLA powder with 7 g was added to 100 mL distilled water，then was heated at 45 ℃ and stirred for 30 min.After cooling，2%glycerin was added and stir mixed.In order to evaluate the fresh-keeping effect of PLA coated eggs，the coated eggs obtained by the above method were stored in the environment of 35 ℃and 40%with the chitosan coated eggs and uncoated eggs.The results showed that the egg surface was smooth，bright and compact after PLA coating.After storage for 11 d，the eggs of the uncoated group all appeared yellowing，while the PLA coating group did not appear yellowing.On the 11th day，the egg mass loss rate in the PLA coating group was reduced by 80.8 % and 68.7 %，respectively，and the huff unit value was increased by 40.9%and 4.4%，compared with the uncoated egg and chitosan coated eggs.