Abstract: Effect of seeding time and plastic sheet mulching on the growth and yield of Clocasia escalenta was studied.The results showed that early seeding very significantly increased the yield.And,on the ground covered with plastic sheets,the earlier seeding produced the greater effects.By plastic sheet mulching,regression equation of leaf area and leaves of single plant is Y=-6043.2852+2916.6632X-77.2088X2.Plastic sheet mulching could very significantly increased yield of 11.02%.Plastic sheet mulching not only improved the quality,but also hastened C. escalenta maturation.