Abstract: Based on the heavy metal data obtained from the surface water of Luoyuan Bay in August 2011, the heavy metal distribution characteristics and its influencing factor were analyzed. The results show that all heavy metal contents in surface seawaters were lower than the standard values of categories Ⅱ of the seawater quality standard; Cu、Pb and Cd tend to be gradually decreased from the coastal sea to the further offshore area, On the contrary, As and Hg are upward tendency;the heavy metals such as As、Hg are positively correlated with salinity, and Hg is negatively correlated with suspended materials, it is expounded that the formation of high value offshore areas is effected by the salinity and suspended matters; the correlations of Hg-As and Cd-Pb are obvious, which show that Hg-As and Cd-Pb have same source.