Abstract: Fragrant pear in ku’er le were used as material to study the effect of 1-MCP(1-methylcyclopropene) on firmness ,fruit gum kinase content, dissolubility form thing content, titration sour content and respiration rate content. The result express that 1- MCP can delay the decrease on firmness, fruit gum kinase and dissolubility form thing after adopting of storing, decelerate titration sour content decrease, and can valid repress respiration rate. The study provided the dependable basis for the uses of 1-MCP in fragrant pear store and fresh keeping..