Tea saponin is a kind of biosurfactant and has the characteristic of good biodegradation and large surfactivity. Its application in soil heavy metal pollution restoration is a new research in recent years The purpose of this thesis is to discuss probe into the safety effectiveness of tea saponin and provides foundation for Scientific and reasonable utilization of tea saponin repair soil heavy metal, by the research of rapeseed seedling growth and physiological properties with tea saponin、the absorpt...