Abstract: The research analyzed the biomass distribution of uncultivated lysimachia clethroides and the absorbing ability, migration and correlation between the content of selenium and mineral elements； the samples of uncultivated lysimachia clethroides were gathered to measure the biomass. The contents of mineral elements and selenium were determined respectively by the atomic luminescence chromatography and the atomic fluorescent method，and the correlation analysis was done meantime. The result showed the biomass distribution rates in the leaves of the lysimachia clethroides were the highest, and the content of selenium was negatively correlated to potassium in the roots and fruits. Besides, the leaves possessed the highest content of selenium.

Key words: Lysimachia clethroides, biomass, mineral elements, selenium, correlation