Values of heavy metals from the 100 surface sediment stations in western Bohai Bay were determined, and two methods were used to evaluate the sediment environment. The results show that the average values of As, Hg, Cu, Pb, Cd in the surface sediments are 12.9×10^-6, 0.031×10^-6, 29.5×10^-6, 27.4×10^-6, 0.159×10^-6. The indices of geoaccumulation show that, in the high value area, Pb and Cu reach the slight pollution level. The potential ecological risk indices show that Hg and Cd have reached moderate ecological harm, while in the study area, the harm degree sequence of the five heavy metals is Hg> Cd> As >Pb> Cu.