Effects of different fertilization rate on dry matter accumulation, plant height and yield under drip irrigation of soybean were studied in the paper.The results showed that the biomass and yield of soybean was best when the optimum fertilizing quantity of soybean under drip irrigation was N 83.8 kg/ha, P2O5 93 kg/ha, K2O 98.7 kg/ha,and the yield was 3434-3536 kg/ha.