Lijiang snow peach has large shape, sweet crisp taste and is in rich of nutrition1-MCP is a new type of ethylene receptor inhibitor, widely used in keeping fruit and vegetablefresh. In this work, the fresh-keeping effect of 1-methylcyclopropene (1-MCP) on snow peaches and its mechanism were explored to find out an effective and safe fresh-keeping way for snow peach. The Lijiang snow peaches were picked from Lashi Township Yulong county andLijiang city were treated by 1-MCP with different concentrations(0.5, 1, 1.5 and 2 μL/L). The results showed that, at refrigerated temperature, 1-MCP treatment was very effective in maintaining hardness and membrane permeability of the peach, as well as inhibiting Lijiang snow peach respiration. 1-MCP treatment with the concentration of 1~2 μL/L was more effective in increasing the Lijiang snow peach POD activity than that with lower concentration. 1 μL/L 1-MCP treatment was effective in inhibiting total phenol content, PPO activity decline, and pulp Browning of Lijiang snow peach. Comprehensive analysis showed that the best treatment concentration of 1-MCP was 1 μL/L.