Field experiments were conducted to study the application effects of potassium sulfate(K 2SO4)and potassiumchloride(KCl)at different potassium(K 2O)application levels(0，337.5，675，1012.5 kg/hm²)on growth anddevelopment，nutrientuptake，potassium utilization efficiency and quality of one -year-old Panax notoginseng[Panax notoginseng(Burk.)F. H.Chen].The results showed that the application of both K 2SO4 and KCl increased the plantheight，leaflength，leafwidth，stem diameter and biomass of Panax notoginseng，and significantly increased the yield by 7.21%～27.33%，with the highest yield in the treatment of 675 kg/hm² K2SO4(KS2).Application of K 2SO4 and KClincreasednitrogen，phosphorus and potassium accumulation of shoot and root of Panax notoginseng，andnitrogen，phosphorus and potassium accumulation of shoot and root of Panax notoginseng increased with the increase of potassium application level.The agronomic utilization rate of potassium fertilizer increased at first and then decreased，and reached the highest at 675 kg/hm²potassium application rate，and the partial productivity of potassium fertilizer decreased significantly with the increase ofpotassium application rate( P<0.05).The application of two kinds of potassium fertilizers reduced the incidence of root rot of Panax notoginsengto someextent.Compared with K ，the application of K 2SO4 and KCl reduced the incidence of root rot by an 0average of 35.80% and28.40%，respectively.Among all potassium applicationtreatments，KS 2 treatment reduced the incidenceof root rot the most.The application of K 2SO4and KCl significantly increased the content of notoginsenosideR1，ginsenosideRg1，Rd，Re，Rb1 and total saponins by 21.74%～89.13%，21.65%～57.22%，21.88%～68.75%，15.79%～68.42%,19.11%～ 49.68% and 20.54%～59.15%，respectively.The effect of KS 2treatment was thebest.Under the condition of thisexperiment， Panax notoginsengwas not sensitive to chlorine.At the same potassium level，the application of K 2SO4 was betterthan KCl in promoting the growth anddevelopment，yield and quality of Panax notoginseng.In order to realize the high yield and quality of Panax notoginseng，the potassium application rate of KS 2treatment(675 kg/hm²)was suitable.