[Objective] To analyze the quality of tetraploid and diploid of Stachys sieboldii Miq.[Method] The diploid materials and tetraploid materials induced from colchicine-treated diploid were cultivated in the same environmental condition.Then,three important quality indicators including dry matter content,soluble protein content and soluble sugar content of S.sieboldii were analyzed.[Result] The dry matter content,soluble protein content and soluble sugar content increased 43.16%,9.46% and 21.74%,respectively in the tetraploid leaf than that in the diploid one;while they increased 13.12%,21.89% and 7.42%,respectively in the tetraploid tuber than that in the diploid one.[Conclusion] The tetraploid is superior to the diploid in S.sieboldii as for the economic value due to containing more nutritional components. [Objective] To analyze the quality of tetraploid and diploid of Stachys sieboldii Miq. [Method] The diploid materials and tetraploid materials induced from colchicine-treated diploid were cultivated in the same environmental condition. Then, three important quality indicators including dry matter content, soluble protein content and soluble sugar content of S.sieboldii were analyzed. [Result] The dry matter content, soluble protein content and soluble sugar content increased 43.16%, 9.46% and 21.74%, respectively in the tetraploid leaf than that in the the diploidone ; while they increased 13.12%, 21.89% and 7.42%, respectively in the tetraploid tuber than that in the diploid one. [Conclusion] The tetraploid is superior to the diploid in S. sieboldii as for the economic value due to containing more nutritional components .