Volatile composition and quality changes of agrocybe cylindracea soft can during accelerated storage were investigated in the study.The contents of volatile substances during the three stages( 0 d,14 d and 28 d) of agrocybecylindracea storage period were analyzed by headspace sampling and gas chromatography – mass spectrometry( GC – MS) technique.There were 79 volatile components identified.Among these volatile components,the content of aldehyde was the highest during storage,but significantly decreased to its 51.63%,48.17% and 45.65% after storage 0,14,28 days,respectively.As the second largest volatile substance,ketone increased from 6.54%( 0 d) to 17.96%( 28 d).Corrupt flavour substance,such as dimethyl sulfide,phenol and 3-methyl-2-butene aldehyde were identified in the 28 d.The characteristic aroma components sulfur,aldehydes and phenolic were positively correlated with off-flavor.Values of sensory characteristics of hardness and color values changed significantly during storage.The results suggested that color,hardness and some volatile components could reflect the quality changes perfectly and can be used as the real-time monitoring of agrocybecylindracea soft can.