Abstract: In this paper the mineral element content, C/N ratio and water content of the nutrition and flowering period of two different developmental stages of the Rumex acetosa Linnaeus which were collected from different areas were analyzed. The results showed that R. acetosa was rich in mineral nutrient content, C/N ratio was low, water content as high as 80%, which is good for the decomposition, the heavy metal content was also low, so R. acetosa is a kind of safe and effective tropical green manure.