Abstract: Abstract: Making a comprehensive comparison of Korla fragrant pear’s fruit quality after branches radiated. We were aimed at improvement the fruit quality for provide theoretical basis and practice guidance, and provide a new way for cultivate good varieties of fragrant pear. The Korla fragrant pear radiated mutation branches fruit as the experimental material, research the differences between the appearance and internal quality index of the pear fruit with different doses of radiation treated. The results show that when the dose was 20Gy,there were no significant differences among the dormant branches and bud branches in the stone cell content, soluble sugar, soluble solids. Sugar acid ratio indicate that the fruit of dormant branches were the most sweet. The fruit of dormant branches had the highest water content in 30Gy while had the highest stone cell content in bud branches. there were no significant differences in soluble sugar and soluble solids content among the fruit of dormant branches and bud branches. Germination was significantly higher than that of dormant Branches in fruits’ Vc and titratable acid content. The dose of 40Gy had the lowest stone cell content, higher content of soluble sugar and vitamin C. Its fruit was sweeter. It had a higher fruit quality. The fruit quality of radiation induced mutation branches had improved. Radiation treatment had the best effect was the dose of 40 Gy.