To explore the effects of phosphate fertilizer reduction on yield and nutrient utilization efficiency of cucumber in protected facilities，field experiments were conducted to investigate the differences in phosphorus absorption and utilization efficiency as well as cucumber yield under the condition of phosphate fertilizer reduction by 10%，30% and 50%.Results showed that the available phosphorus contents in 0～20 cm soil layer decreased with the increase of phosphate fertilizer reduction，the content and accumulation of phosphorus in cucumber plants firstly increased and then decreased as the phosphate fertilizer reduced by 10%～50% on the basis of formula fertilization.When the phosphate fertilizer was reduced by 30%，the total phosphorus accumulation in cucumber reached the highest level(7.17 kg·hm-2)，and the contribution rate，agronomy efficiency，partial productivity and absorption and utilization ratio of phosphate fertilizer were increased by 178.7%，388.7%，75.4% and 162.9%，and the yield and output-input ratio were increased by 22.8% and 25.1%，respectively.In summary，reasonably reduction of phosphate fertilizer application significantly increased phosphorus absorption and accumulation in cucumber plants，and increased yield and output-input ratio as well as phosphorus utilization efficiency of cucumber under the water and fertilizer integration condition.