The experiment was carried out to evaluate the effects of short-term(9days)low nitrogen supply ongrowth，yieldand quality of pepper grown in nutrient solution with potted cultivation during fruitstage，in 2018～2019.Three treatmentswere setup，including low nitrogensupply(0.83mmol/L，T1)，moderately low nitrogensupply(5.83mmol/L，T2)andthecontrol(9.83 mmol/L，CK).The results showed that T2 had no significant effect on net photosynthetic rate of pepperplant.The plant height of T1 and T2 treatments decreased compared with thecontrol.However，after returning to normalnitrogensupply(9.83mmol/L)for 9days，the plant height of T2 increased compared with thecontrol，but there was nosignificantdifference.The leaf area of the plants was not significantly different during the treatmentperiod.After recoveringto normal nitrogen supply for 9days，the leaf area of the plants treated with moderately low nitrogen treatment significantlyincreased compared with the control，while the yield was not significantly different from thecontrol.Low nitrogen treatmentimproved the fruit quality.Compared with the control，the level of Vc，soluble protein，soluble sugar，capsaicin anddihydrocapsaicin in the fruits of moderately low nitrogen treatment significantly increased，and the nitrate level decreasedsignificantly.Low nitrogen treatment increased plant biomass，and both the dry and fresh weight of plants leaves suppliedwith moderately low nitrogen treatment were higher than thecontrol.Consequently，moderately low nitrogen treatment(5.83mmol/L)in a short period during fruit stage improved fruit quality on the basis of ensuring plant growth and yield.