Six-year-old Korla fragrant pear trees were fertilized with 15N-labelled urea before early bud stage to examine the absorption, distribution, and utilization of urea. Results showed that there was a significant difference of 15N distribution rate in organs at different growth stages. 15N was pre-ferentially distributed in the roots , with Ndff (15N amount absorbed from the fertilizer contribution rate of the total nitrogen organ) being the highest in roots following by new shoots at full-bloom stage. During new shoot growing and fruit expanding stages, 15N absorbed in roots preferentially moved to new organs (leaves and new shoots), with 15N distribution rate to roots being continuously decreased. Fruits became the new distribution center with highest Ndff at harvest stage. The amounts of absorbed 15N in fruits accounted for 19.8% of total absorbed 15N in the tree. The utilization rate of 15N-labelled urea at current season increased gradually with the growth stages. The maximum value of utilization rate was 18.5%, which was observed at harvest stage.