Abstract: 【 Objective 】 The orthogonal combination of Calcium and 1-MCP were found to control the incidence of calyx tip black spot in korla pear during postharvest storage.【 Method 】 The effects of different treatments on fruit quality and incidence of calyx terminal black spot were studied by using the orthogonal combination of 0.014%, 0.017% and 0.020% calcium fertilizer before harvest and 1.0, 2.0 and 3.0 μ/L 1-MCP treatments after harvest.【 Result 】 Low concentration of calcium before harvest combined with 1-mcp treatment after harvest could make the fruit maintain a higher hardness and bright skin color. And spraying calcium into the tree body before harvest could enhance the postharvest fruit's ability to resist the occurrence of calyx tip black spot and other diseases.【 Conclusion 】 (0.017% liquid calcium + 2.0 μL/L 1-MCP) treatment could maintain higher hardness and better skin color.(0.014% liquid calcium + 2.0 μL/L 1-MCP) treatment could significantly reduce the rate of calyx tip dark spot and its rate of decay during storage, and had the best inhibitory effect on calyx tip black spot.(0.020% liquid calcium + 1.0 μ/L 1-MCP) treatment could maintain the integrity of fruit cell membrane.