The effects of different optimal fertilization modes on yield，quality and tree growth of satsuma orange were studied to provide technical guidance for achieving high yield and quality of.satsuma orange.A field experiment was conducted with satsuma orange as material，four treatments were set up: FM(farmer routine fertilization)，OF(FM+organic.fertilizer)，OPT(N，P，K optimization+organic.fertilizer)，COF(OPT+Ca，Mg).All the three optimized fertilization modes promoted the growth of satsuma orange，the short-term effect of applying organic fertilizer was not obvious.The optimization of N，P，K and application of organic fertilizer significantly promoted the growth of the tree in the later stage，the optimization of N，P，K combined with application of organic fertilizer and Ca and Mg elements had the best effect，which，compared with FM，significantly improved the growth indicators of spring shoots；leaf SPAD value and mineral nutrient content were significantly increased；the transverse diameter，longitudinal diameter，single fruit weight，number of fruit，and yield of fruit were significantly increased by 9.69%，8.66%，6.68%，4.74%，11.76%，respectively；fruit reducing sugar，vitamin C，soluble solids，solid acid ratio and edible rate were significantly increased by 55.67%，21.45%，8.21%，27.12%，2.48%，respectively.Comprehensive optimization of nutrient management can balance tree nutrients，stimulate tree yield potential and improve tree quality.