This experiment studied the influence of three film packaging [32.7 μm polyethylene bag(MA1),19.1 μm polyethylene bag(MA2),32.7 μm polyethylene bag with four holes(CK)] on the postharvest senescence and quality of Pleurotus eryngii.The results showed that brown spots appeared on the surface of Pleurotus eryngii treated with CK,and in consequence these Pleurotus eryngii lost edible value after 2 days of storage in 20～25℃.While the film packages of MA1 and MA2 could significantly prolong the shelf life of Pleurotus eryngii.In comparison with MA1,the treatment of MA2 could slow down the decrease of protopectin content,suppress the increase of membrane permeability and MDA content and keep the higher activity of cellulose and polygalacturonase of Pleurotus eryngii during storage for 8 days.In addition,the treatment of MA2 could alleviate the increase of crude fibre content and keep a higher content of titratable acid,but the effect on Vc content was not significant.It was suggested that the film package of MA2 could relieve the senescence of Pleurotus eryngii.