In view of the problems of the limited nutrient types supply of chemical fertilizer andunbalanced fertilizer applicationin vegetableproduction，the effects of different amounts of bio -organic fertilizer on theyield，quality and nutrient utilization of chinese chive were studied to provide the theory and technology for rationally applying bio-organic fertilizer combined withchemical fertilizers.The experiment adopts randomized block design，and 5 treatments were setup: with no fertilization(CK)，conventional fertilization(T1)，2 400 kg/hm² bio-organic fertilizer + conventional fertilization(T2)，3 600 kg/hm² bio-organic fertilizer + conventional fertilization(T3)，4 800 kg/hm² bio-organic fertilizer + conventional fertilization(T4). The results showed that compared with chemical fertilizer applicationonly，the application of combined with bio -organic fertilizer significantly increased the yield of chinesechive，and increased the utilization rate ofnitrogen，phosphorusand potassium fertilizer and itsabsorption.Compared with the treatment of 2 400 kg/hm² bio-organicfertilizer，the dry matter accumulation and yield of chinese chive treated with 3 600 kg/hm² and 4 800 kg/hm² bio-organic fertilizer were significantlyincreased，but there was no significant difference between them.Compared with conventional fertilization，the yield and economic benefits of chinese chive treated with 2 400 kg/hm²，3 600 kg/hm² and 4 800 kg/hm² bio-organic fertilizers weresignificantlyincreased，increasing by13.2%，19.2%，19.9% and10.2%，13.1%，10.1%，respectively. The bio -organic treatment of 3 600 kg/hm² and 4 800 kg/hm²significantly increased the dry matter accumulation of ChineseChive.Comparedwith conventionalfertilization，the application of 3 600 kg/hm² and 4 800 kg/hm² bio-organic fertilizer significantly increasedthe soluble sugar and vitamin C content of chinese chive，which increased by25.0%，28.0% and7.5%，22.0%，and thenitrate content decreased by 19.4% and 25.9%，respectively.Bio -organic fertilizer application had no significant effect onsoluble proteincontent.The soluble sugar and vitamin C content of 3 600 kg/hm² and 4 800 kg/hm² bio-organic fertilizer were significantly higher than those of the 2 400 kg/hm² bio-organic fertilizertreatment.The utilization rate of nitrogen and phosphorus fertilizers increased with the increase of the amount of bio-organicfertilizer，and the utilization rate of potassium fertilizer was the highest with 2 400 kg/hm² bio-organicfertilizer.The application of 3 600 kg/hm² bio-organic fertilizer couldobtain the maximum economic benefit with high yield，significantly improve the quality of chinesechive，increase the drymatter accumulation and the utilization ofnitrogen，phosphorus and potassium fertilizer rate.