The flowering biology and fruit development characteristics of a Xinjiang apricot （Armeniaca vulgaris Lam） cultivar Kezilang were studied by measuring its flowering phenology, floral organ development, stigma receptivity, pollen quantity, pollen viability, fruit diameter, fruit fresh weight, fruit dry weight and fruit contents, with an attempt to provide a theoretical basis for the cultivation and promotion of Kezilang. The results showed that Kezilang can be popularized as an early-maturing apricot cultivar, as it had high fruit setting rate, large fruit weight, excellent taste, high sugar content and lower titratable acid content in fruit. The dynamic curves of Kezilang fruit diameters in three directions, fruit fresh weight and fruit dry weight were all S-shaped, and the rapid growth stage of dry weight was later than that of other terms. Fruit swelling was due to higher water content of flesh tissue in early stage of the rapid growth periods of fruit. Most sugar in flesh was accumulated at the second rapid growth period of fruit.
