The difference of growth，yield and quality of passion fruit under different nitrogen and potassium levels was an-alyzed in this study，which could provide a reference for guiding rational fertilization of passion fruit.Based on the ‘3414’ fertilizer experiments，the effect on growth，fruit quality and yield of passion fruit by different nitrogen and potassium levels were investigated.Combined with the fertilizer response function，the optimal nitrogen and potassium application amount of passion fruit was determined.The soil fertility of the test orchard was at an appropriate level.In this experiment，under the condition that the amount of phosphorus and potassium fertilizer was the same，the plant height，stem diameter and fruit weight of passion fruit showed a trend of increasing first and then decreasing with the increase of the amount of nitrogen fer-tilizer; and the stem diameter and fruit weight of passion fruit reached the maximum value at the N2(249.76 kg/hm²)level; the N and Ca contents of fruit increased significantly，while the contents of K，Mg，Cu and Zn in fruit decreased; the yield of passion fruit increased firstly and then decreased with the increase of nitrogen fertilizer，and the highest yield was 80.80 kg(14947.27 kg/hm²)under N2P2K2 treatment.Under the condition of the same amount of nitrogen and phosphorus fertilizer，with the increase of the amount of potassium fertilizer，there were no significant differences in plant height and stem diameter between N2P2K0，N2P2K1，N2P2K2 and N2P2K3 treatment; However，the content of soluble solid and total acid in passion fruit increased significantly.The contents of soluble solids and total acids in N2P2K3 treatment were 7.04% and 36.20% higher than that in N2P2K0 treatment，respectively; the content of K in fruit increased significantly，while the content of Ca，Mg and Cu decreased significantly.The effect of potassium fertilizer on passion fruit yield was the same as that of nitrogen fer-tilizer，and N2P2K2 treatment had the highest yield.Scientific fertilization is the prerequisite to guarantee the normal growth and quality of fruit trees.Taking into account the economic benefits and yield，combined with the fertilizer response function equation，the optimal nitrogen application amount of passion fruit is 254.94 kg/hm²，and the optimal potassium application amount is 187.73 kg/hm².Compared with the conventional fertilization of farmers，the application of nitrogen fertilizer was increased by 5.18 kg/hm²，and the application of potassium fertilizer was reduced by 62.03 kg/hm².In other words，with the condition of achieving the same output value，if the passion fruit was planted according to the recommended application of nitrogen and potassium，the input cost of farmers could be saved by 409.71 yuan/hm².Based on the experiment，the recom-mended dosage of urea and potassium sulfate for passion fruit is 474.20~634.20 and 288.10~448.10 kg/hm².