Taking the Hongyu mango variety in Changjiang Farm as the test material，the conventional ditch fertilization(CK)，same amount of fertilizer with CK but integrated with water(T1)，fertigation with reduction of 10% fertilizer(T2)，fertigation with reduction of 20%fertilizer(T3)，fertigation with reduction of 30%fertilizer(T4)，and fertigationwith reduction of 40% fertilizer(T5)were conducted to study the effect of fertilization on the size，yield and quality ofmangofruit.The results showed that there was no significant difference among the yields of differenttreatments( P>0.05).Compared withCK，the fertilizer efficiency of T4 and T5 was significantly increased( P<0.05).The reduction of fertilizationhad a slight effect on the biological characteristics of mango.With the decrease of fertilizer amount，the cross -stalk of mangofruit increased significantly.There was no significant difference in fruit length，fruit width and quality of mango fruit.For theanalysis of economic traits of mango，the economic benefits of fertigation treatments were higher than CK，and the economicbenefit of T2 treatment was thehighest，reaching 324.566 5 yuan/hm²，which was 15.23% higher than that of CK. Based onthe evaluation of fruit quality and yield by the main components analysis，the main component scores of the fruit indicatorsranked from high to low was T3>T4>T2>CK>T5>T1.Therefore，under the fertigation condition，90% of the conventionalfertilizer amount had the highest economicbenefit； under the fertigation condition with 40% reduction of conventional fertilizeramount，the fertilizer yield was the highest and the fertilizer consumption was thelowest，but the fruit yield and quality werenot lowered. Under the fertigation condition with 20% reduction offertilizer，mango’ s quality index and yield comprehensive score were the highest.