Two-factor random block group experiment was conducted using taro Xianghe with the treatments of three organic fertilizer dosages(15，30 and 45 ton/hm²)and three densities(3.75×104，5.25×104 and 6.75×104 plants/hm²).The effects of organic fertilizer dosages and densities on agronomic characters，yield structure were studied.The results showed that plant height，leaf area index，stem and leaf dry weight were significantly increased under F30 and F45 compared with F15(P<0.05)，and were increased by 5.56%，5.56%，3.15%，23.41% and 12.88%，23.33%，21.44%，30.51% at 6th leaf stage，and by 5.95%，6.96%，3.85%，8.78% and 10.40%，10.43%，9.41%，13.04% at 12th leaf stage， respectively.Compared with M3.75，the plant height，stem and leaf dry weight with the increased of density showed a downward trend both 6th and 12th leaf stages，while the leaf area index was relatively consistent(except for M6.75 at 6th leaf stage).Fertilizer dosage，density and their mutual effects on taro yield were significant，increasing planting density and fertilizer dosage can easily access to high yield.The experiments obtained the maximum theoretical yield and actual yield(24625，22949 kg/hm²)when fertilizer was 45 tons/hm² and density was 6.75×104 plants/hm²，and F45M5.25 had the highest yield of commercial taro with 15727 kg/hm².It is suggested for this region that the organic fertilizer of 45 tons/hm² and planting density of 5.25×104 plants/hm² are the optimal measures considering the production and commercial situation.