Soil and leaf samples were collected from 26 Guanxi pomelo orchards of different tree-age(4～10,10～20,>20years)in the six towns of PingheCounty,FujianProvince,i.e.,Banzai,Wenfeng,Xiazhai,Xiaoxi,Wuzhai andGuoqiang and soil and leaf nutrients wereanalyzed.The results showed that soil pH value of 26 orchards ranged from 3.51to5.77,with an average of 4.26 which was extremelyacidic.The contents of alkalineN,availableK,exchangeable Caand Mg were all at shortage or extreme shortagelevels.The soil availableP,Fe and Cu contents ranged from high to excessivelevels.The contents of soilOM,exchangeable Ca andMg,effective Mn decreased significantly with tree-age.The contentof soil available B was at a deficient level and increased drastically with planting ages.The contents ofK,Ca and Mg of leavesof 26 orchards weresuitable,the contents ofP,Mn,Cu and B were high evenexcessive.The contents of N and Fe of leavesof young trees(4～ 10years)were high and Zn contents for young and elder trees(4～10,10～ 20years)were a bitlow.Therefore,the soil fertility of the Guanxi pomelo orchards changed remarkably with tree-age,the contents of soil OM,availableCa,Mg and Mn decreased significantly with the age of trees.The nutrient contents of the Guanxi pomelo leaves didn’t show significantly changes with tree-age.Meanwhile,the contents ofP,B,Mn,Cu of leaves were high orexcessive,while Zn was a bitlow.Therefore,for the sake of the balance of trees’nutritional and fruitquality,we shouldameliorate acidity and increaseOM,Ca and Mg nutrients in the management of old orchards.