Rational application of fertilizer is an important way to improve fruit quality.A field experiment was carried out with a six-year old ‘Jizaohong’ apricot as the test material，4 ratios of nitrogen，phosphorus and potassium (T1，N∶P2O5∶K2O=2∶1∶2；T2，N∶P2O5∶K2O=2∶1∶3；T3，N∶P2O5∶K2O=2∶1∶4；T4，N∶P2O5∶K2O=1∶1∶3) were set up to examine the changes of photosynthetic characteristics of leaves during fruit expanding period and the fruit quality and soil nutrient content.The results showed that with the increase of potassium fertilizer dosage，the photosynthetic capacity of leaves first increased and then decreased，the soluble solid content and titratable acid content of fruit gradually increased，and the fruit texture first increased and then decreased.With the decrease of nitrogen fertilizer input，photosynthetic capacity of leaves decreased and fruit quality decreased.Compared with other treatments，T2 treatment had the lowest intercellular CO₂ concentration，the highest stomatal conductance，the highest net photosynthetic rate and the strongest photosynthetic capacity.Its soluble solid content was higher，titratable acid content was lower，cohesiveness and elasticity and chewiness were the highest，adhesive force was the lowest.Its flesh tasted sweet and sour，crunchy and juicy，fruit quality was the best.The nitrate nitrogen and available potassium contents of T2 treatment in the 0～60 cm soil layer after harvest were 9.36 and 128.72 mg/kg，respectively.It was comprehensively considered that under this test condition，when NPK ratio was 2∶1∶3，the fruit quality was good and the soil fertility remained at a moderate level after harvest.