Abstract: Effects of PP333 on growth of shoots of ‘Datuanmilu’, ‘Hujingmilu’ and ‘Xipu No.1’ trees were studied. The study showed that the growth of shoot of medium-late melting peaches was significantly restrained by different concentrations of PP333. From results of shoots growth, yield, and the shape of the fruits, the best concentrations are the 12000 mg/L of PP333 for foru-year-old ‘Datuanmilu’ and 8000 mg/L for five-year-old ‘Hujingmilu’ and six-year-old ‘Xipu No.1’.