Abstract: In this article,a study on the relationships between the beefwood(Casuarina equisetifolia)growth and the micronutrient B,Mo,Mn,Cu and Zn in the coastal sandy soil of Guangdong was made.The results showed that the B and Mo benefited the promoting growth and resisting disease pest;the Cu high concentration restrained the growing,others were not any role for the growing of beef-wood.