Taking greenhouse tomatoes as research objects，dynamic changes of tomato growth and nitrogen nutrient accumulation were studied in five fertilization levels(in N，N0:0 kg/hm²，N1:150 kg/hm²，N2:300 kg/hm²，N3:450 kg/hm²，N4:600 kg/hm²，N-P-K=15-5-25)to explore the effects of different fertilization levels on tomato growth and development，nitrogen absorption，and fertilizer use efficiency under the integrated water and fertilizer technology.The results showed that:compared with N4 treatment，N2 treatment improved the shortness of tomato plants，the plant height decreased by 15.9%(P<0.05)，and the stem thickness increased by 27.8% (P<0.05)；N2 treatment had higher SPAD value of leaves，which increased by 10.7% and 13.2% at 55 and 115 d after tomato planting，respectively(P<0.05).With the growth period advancing，the dry matter mass and nitrogen accumulation of tomato plants increased in a “slow-fast-slow” trend.Increasing fertilization could increase the dry matter mass and nitrogen accumulation of tomato plants，but there were no significant difference among the fertilization treatments.Fruit quality was significantly affected by fertilization.Among them，the soluble solids in N2 treatment increased by 28.3%(P<0.05)compared to N0 treatment，and the titratable acid content increased by 22.5% and 19.8%(P<0.05)compared with treatments of N0 and N4，respectively.Fertilization increased tomato yield，but high fertilization levels did not significantly increase yield.Among them，the yield of N2 treatment increased by 13.2% compared with that of N0 treatment，and there was no significant difference compared with the treatment of N3 and N4.The nitrogen use efficiency(NUE)and partial factor productivity(PFP)of greenhouse tomatoes decreased significantly with the increase of fertilization level.The NUE and PEP of N2 treatment were 1.82 and 1.74 times of N4 treatment(P<0.05)，and greenhouse tomato had the highest agronomic utilization rate of nitrogen fertilizer in N2 level，which was 1.9 and 2.9 times that of N3 and N4 treatments(P<0.05).Taking into account indicators such as tomato growth，yield quality，and fertilizer utilization rate，under the conditions of this experiment the N2 fertilization level is the appropriate fertilizer amount under the conditions of water and fertilizer integration.