Pineapple production in Hainan province faces a widespread problem of over-fertilization.This study aims to explore a reasonable fertilization practice.A field experiment was conducted including four treatments:no fertilization control(CK)，farmer’s practice(FP)，reduced chemical fertilization(OPT1)and reduced chemical fertilization+organic fertilization(OPT2).Plant dry matter，yield，fruit quality and economic benefit were compared under different treatments.As the results shown，fertilization increased pineapple plant dry matter in the order of OPT2>OPT1>FP>CK，with OPT2，OPT1 and FP increasing by 120.05%，113.53% and 99.74% compared to CK，respectively.Pineapple yield was in the order of OPT2>OPT1>FP>CK，with OPT2 and OPT1 increasing by 6.66% and 6.53% compared to FP，respectively.Compared to CK，three fertilization treatments significantly increased fruit appearance quality in terms of fresh weight per fruit，fruit height，fruit width and fruit height/width ratio，with no difference occurring between three fertilization treatments.Also，compared with CK，fruits under FP，OPT1 and OPT2 had lower levels of titrable acid and vitamin C，and similar levels of soluble solid and soluble sugar，making a higher sugar/acid ratio.Fertilizer cost was in the order of FP>OPT2>OPT1>CK，while net income was in the order of OPT1>OPT2>FP>CK.Net income under OPT1 increased by 111.27%，21.33% and 5.21% compared with CK，FP and OPT2，respectively，and OPT1 displayed the highest output/input ratio of 4.74 ∶1.In conclusion，fertilizer application increased pineapple growth and yield.Compared to farmer’s practice，reduced chemical fertilization had the potential to increase net income without reducing yield and fruit quality.Considering the yield，fruit quality and economic benefit，reduced chemical fertilization(OPT1)was a reasonable fertilization practice for pineapple production under current situation.