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【Objective】In order to provide a theoretical basis for the increase of yield and output value of tea and the nutrient absorption of big-leaf tea species in modern tea garden,this paper studied the effects of optimized fertilization technology on the quality of tea in modern tea garden of Pu’er.【Method】In this paper,‘Yunkang14’,an excellent tea variety,was used as the test material,and the plot experiment was carried out with treatment 1(no fertilization,CK),treatment 2(conventional fertilization),and treatment 3(Formula fertilization) and treatment 4(Optimized formula fertilization).The treatment 3 and treatment 4 had the same amount of fertilizer applied,but different fertilization methods.【Result】The accumulation of nitrogen,phosphorus and potassium in the new shoots of tea tree in treatment 4 were significantly higher than those in other treatments.The contents of phosphorus and potassium in tea shoots were significantly higher than other treatments; the agronomic efficiency of treatment 4 was 9.58 kg/kg for nitrogen fertilizer,22.99 kg/kg for phosphate fertilizer and 28.74 kg/kg for potash fertilizer,respectively,and their partial productivity was 23.14,55.54 and 69.42 kg/kg respectively.Compared with treatment 2 and treatment 3,the 100-bud weight of treatment 4 increased by 12.74 % and 2.06 %,the germination density increased by 10.84 % and 1.14 %,the fresh leaf yield increased by 15.71 % and 3.98 %,and the output value increased by 28 135 and 3224 yuan/hm2,respectively.【Conclusion】In the field experiment,the optimized fertilization technology can significantly improve the tea yield,output value and nutrient uptake of Pu’er modern tea garden.It is suggested to promote the optimized fertilization technology in Pu’er modern tea garden tea production [ABSTRACT FROM AUTHOR]