Plants are playing a vital role in the treatment of various diseases in all important system of medicine. There are many plants on the earth which lies unexplored in the field of medicine. One such plant is Crotaleria juncea L. which is known as sunhemp, pundi or san etc. valuable fibre is obtained from the bark which has greater tensile strength and more durable than jute. Plant is a rich source of alkaloids, particularly pyrrolizidone alkaloids and toxic aminoacids in seeds. C. juncea having a promising place in the Ayurveda for its abortificient, emetic, laxative, leprosy and blood diseases. In the present review the complete update on the plant has been enlightened to bring out the hidden medicinal values of the plant.