Effects of treatment with 1-MCP(1-Methylcylopropene) or its structural analogues 1-PentCP(1-pentylcyclopropene) and 1-OCP(1-octylcyclopropene) on metabolism and characteristics of 'Hanfu' apple in cold storage was investigated.The results showed that treatment of 1-MCP or its structural analogue reduced ethylene production and respiration rate,delayed the respiration and ethylene peak for 30 days compared with those of untreated fruits.All the treatments helped to keep the fruit firmness and content of titratable acid,and delay the increase in Soluble Solids.Meanwhile,all the treatments delayed the decrease of the activity of superoxide dismutase and peroxidase,and maintained the activity of catalyses.However,the treatment of 1-MCP and its structural analogues had no obvious differences.