The effects of different concentration 1-MCP treatment on the fruit of Mopan persimmons during Hypobaric refrigeration were studied by analysis of storage and physiological properties of the fruit.The results showed that 1-MCP treatment had remarkable effect on the inhibition of the decline of fruit firmness and soluble tannin content.Meanwhile it inhabited the increase of total soluble solids content(after removing soluble tannin),MDA,membrane relative permeability and PPO activity,and kept a high SOD activity,but had no remarkable effect on titratable acidity content.The result also indicated that the feasible concentration of 1-MCP was 1.0 μL/L.