Abstract: Effects of spraying different concentrations of paclobutrazol on the growth and development of passion fruit plants and fruits were studied. The results showed that spraying paclobutrazol could significantly increase the number of flowers and fruits bearing number, and had a certain effect on the quality of passion fruit. The spraying of 500 mg·L^-1 paclobutrazol solution had a better effect, and passion fruit had the best indexes of fruit diameter, longitude, single fruit weight, soluble solids and juice-extracting rate.