Abstract: In this study, cucumber (Cucumis sativus ‘yesan’) were used to investigate the effects of 1-methylcyclopropene (1-MCP) on the postharvest fruit quality. Before 0℃ storage, the cucumber were treated with 10 ppm 1-MCP for 24 h, and the fruit organoleptic quality, relative electric conductivity, Vc content, TA content and the weight loss rate were measured during the low temperature storage. As the results, 1-MCP could delay the increasing of the relative electric conductivity, alleviate the occurrence of chilling injury. The decreasing of Vc and TA were also inhibited by 1-MCP treatment. In all, 1-MCP can maintain the good quality of cucumber.