Abstract: This paper deals with the choice of nutrient solutions for the solution culture of the seedlings of Calamus tetradactylus, the best ratio of N P K in nutrient solution for the growth of the seedlings, the symptoms of nutrition deficiency and the effects of nutrition deficiency on the growth of the seedling. The results showed that 1/2 Machlis nutrient solution at pH 5.0 was quite suitable for the solution culture of the seedling; the ratio of 90×10-6(ppm) N:40×10-6(ppm)P:160×10-6(ppm)K was the best;the symptoms of nutrition deficiency appeared on the seedling very slowly, but after 6 months of solution culture some symptoms could be seen. During the solution culture, nutrition deficiency affected the growth of the above-ground more seriously than that of under-ground,therefore the rate of fresh weight of the above-ground to under-ground decreased.