Abstract: A field experiment of reductive fertilization on banana under unsaturated irrigation condition was carried out to establish a technological system for irrigating and fertilizing scientifically. The results showed that, as compared with traditional fertilizers management(as CK), the leaf number, leaf width during floral emergence and SPAD values were efficiently enhanced, the yield of banana under drip irrigation was significantly increased by 9.9% to 14.3%, since the finger number, finger length and finger girth of banana under drip irrigation were efficiently enhanced. Meanwhile, the amount of fertilizers used in drip irrigation could be decreased than that used in the traditional method. Especially, the N-fertilizer and K-fertilizer could be reduced 98kg/hm2 to 254kg/hm2 and 337 kg/hm2 to 1024 kg/hm2, respectively. Based on the results, it showed that the benefit of banana production was increased significantly by fertigation which compared with the conventional irrigation and fertilization. It also suggested that the method of fertigation was a suitable irrigation and fertilization technique for banana production in Hainan.