The research systematically studied fruit quality and yield and nutrient status of Bingtang sweet orange( Citrus sinensis)orchards in Xinpingcounty，YunnanProvince，in order to provide a theoretical basis for scientific and rationalfertilization and improve the fruit quality and produce higher economic benefits 105samples(includingfruits，spring shootleaves，andsoil)were collected from 22 representative Bingtang sweet orange orchards of the main towns in Xinping county. The intrinsic quality index of the fruit and the mineral nutrient contents of all samples were measured and analyzed.Thenthe relationship betweenyield，quality and nutritional content of Bingtang sweet orange were analyzed.The results showedthat most orchards were acidic soil，the average pH value was5.73；the soil nutrient was generally poor，the deficiencypercentages of soil organic matter(SOM)and availableN(AN)were 52% and96%，respectively；the deficiency ofavailable P(AP)and availableK(AK)contents coexisted with the excess.The leaf phosphorus(P)Zinc(Zn)，andmagnesium(Mg)contents were generally low，and the percentages in low level accounted for95%，93% and60%，respectively.The percentages of leafcopper(Cu)，manganese(Mn)，iron(Fe)andnitrogen(N)with high contentsaccounted for93%，63%，51% and36%，respectively.Bingtang sweet orange in Xinping county had a low yield and poorquality.The average yield per tree was 23.1 kg.The contents of total soluble solid(TSS)，titratable acid(TA)andvitaminC(Vc)were10.13%，0.49% and 40 mg .100 mL -1，respectively.The amount ofN，P 2O5 and K2O required forper ton of Bingtang sweet orange fruit was 2.63～ 3.15kg，0.88～ 1.05kg，4.38～ 5.25kg，respectively.The correlationanalysis between nutrientcontent(soil andleaf)andyield，quality indicators showed that there was a significantly positivecorrelation between soil AN content and yield，and a highly significantly positive correlation with Vc content.There was ahighly significantly positive correlation between soil AK content and TSScontent.There was a highly significant negativecorrelation between leaf N content and TSScontent.There was a highly positive significant correlation between leaf Mgcontent and TSS content，a highly positive significant correlation between leaf Ca content and peel thickness，a highlypositive significantly correlation between leaf Zn content andTSS，Vccontent.Insummary，Bingtang sweet orange orchardsin Xinping county has a low quality of fruit and great differences between the orchards in manyaspects.The nutrient contentsvaried greatly for leaf and soil samples.Most orchards had leaf Zn deficiency and Cu excess，some orchards had leaf Mgdeficiency and Nexcess.Most orchards were acidsoil，soil fertility was poor and soil nutrients were easilylost.Thus，itis recommended to appropriately increase the frequency offertilization，apply slow -release nitrogen fertilizer instead of fast-effective nitrogenfertilizer，and increase the depth of organic fertilizerapplication.Moreover，a supplement of middle andmicro elements fertilizers isneeded，especially for Mg and Zn.