Abstract: 【Objective】 To study the effects of different treatments on the development of vascular bundles of fruit stalks, ankles and sacs of Korla Fragrant pears, and the detachment of the stalks during the inflorescence elongation period in the hope of clarifying the differences in the effects of leaves and sepals on the development of vascular bundles. 【Method】 The pears with Du pear as the rootstock were used as materials to compare the effects of leaf picking and sepal picking on the shedding rate of different order pear fruits and the number and area of vascular bundles in different parts of the fruit. 【Results】 Compared with the control, the leaf shedding rate decreased the first and second order dislocation rates, and the third, fourth, and fifth order dislocation rates increased; the sepal excision treatment reduced the first and the second order dislocation rate, The 3rd position dislocation rate increased, and the influence on the 4th and 5th order was small. The number and area of vascular bundles of fragrant pears differed between different orders and different parts of the fruit. That was, as the inflorescence elongation process progressed, the number and area of vascular bundles of the first and the second orders treated by leaf picking and sepal picking all gradually increased the trend, the number and area of vascular bundles in the 3rd, 4th, and 5th positions of the stem, crotch, and sputum all increased first and then decreased. The results of this study showed that leaf picking promoted the number of vascular bundles in the 4th and 5th orders and the vascular bundle area in the 5th order; The number of vascular bundles in the first to 5th order was improved and the area of the vascular bundle in the first, the second and the third order was enlarged by the sepal picking. (except for that, the area of the vascular bundle in the second order was inhibited). 【Conclusion】 Comprehensive comparison showed that leaf picking had a greater inhibitory effect on the vascular bundle development of pear fruits, thereby increasing the rate of fruit tuber detachment. However, the treatment of sepal picking promoted the increase of the number of vascular bundles in the later period and development of fruit stem vascular bundles, thus reducing the rate of fruit tuber shedding.