Abstract: Autumn foliar treatment was effective to increase the nutrition accumulation of fruit tree, opulent nutrition supplying assured the fruit cell splitting, meanwhile it was the base of fruit size increasing. Autumn nitrogen treatment influenced the hormone content in stick of apricot grown in plastic greenhouse before blooming, ABA and GA were important during the course of dormancy breaking in apricot, the urea treatment of 3% and 5% influenced the hormone content in stick which was beneficial to dormancy breaking and bud developing. Different concentration of urea all influenced the hormone content in stick before blooming, that increased the new shoot growth amount in former period as well as promoted the fruit diameter in length and breadth. To sum up, the urea concentration about 3% was more suited for autumn foliar treatment of apricot in protected cultivation.