Abstract: Solanum nigrum L. is a kind of important medical plant in QingTibet Plateau and the whole plant could be used as medicine. It abundantly contains several kinds of alkaloids including biological alkaline, solanine, solasonine, etc. They have pharmacological effects on antiinflammation, antitussive and expectorant, leavening concentration of blood sugar and adjusting excitability of the central nervous system and so on. Meanwhile, the fruit of Solanum nigrum L. have abundant nutritious components consisting of fructose, minerals, manifold amino acids, etc. But the resource of wild plant decreases markedly because of excessively exploration and execrable natural environmental conditions in QingTibet Plateau, which is detrimental to ecological environmental protection of QingTibet Plateau and sustainable utilization and exploitation of medical plants. In this paper, the biological characteristics, populated botanical characteristics, community and quantity characteristics and resource accumulation of Solanum nigrum L. in Qinghai Province were investigated by the method of pointing field, the least sample and statistics. Furthermore, the resource accumulation of it was calculated.

Key words: Solanum nigrum L., biological characteristics, resource accumulation, Qinghai Province