Abstract: Taking peach sticks fertilizer（PSF）as base fertilizer,the effects of PSF on yield and quality of peach were studied by using three application gradients(15 000kg·hm^-2,30 000kg·hm^-2,45 000kg·hm^-2)compared with conventional organic fertilizer,in order to provide reference for the rational application of the fertilizer on big peach.The results showed that the yield,soluble sugar content and soluble solids content of peach could be decreased with the application of 15 000kg·hm^-2PSF.There were no significant differences in yield,soluble sugar content and soluble solids content between 30 000kg·hm^-2 and 45 000kg·hm^-2 PSF treatments and local conventional organic fertilizer treatments.The dosage of 45 000kg·hm^-2 PSF could significantly increase the titratable acid content of peach fruit,resulting in lower sugar-acid ratio than other treatments.The vitamin C content of large peach was not affected by dosage of PSF.However,nitrate content increased significantly with the increase of PSF dosage.Compared with the three dosage gradients of PSF,the yield and quality of 30 000kg·hm^-2 were superior,and there was no significant difference with local conventional organic fertilizer treatment.Comprehensive analysis showed that the dosage of PSF was recommended to be 30 000kg·hm^-2 in Pinggu peach production.