The accumulation of heavy metals in wetland plants was studied in this paper．Phragmites australis, Scirpus validus, Lythrum salicaria, Scirpus planiculmis and Typha angustata were selected to use as test plants, comparing their accumulation of five heavy metals(Cd, Cr, Hg, Pb, Zn). The results showed that: (1) the treatment system with wetland plants has higher accumulation to five heavy metals (Cd, Cr, Hg, Pb, Zn) than that without wetland plants. While the treating time was prolonged, the contents of five kind of heavy metals were decreased. (2) The five wetland plants have a significant difference for bioaccumulation to five heavy metals(Cd, Cr, Hg, Pb, Zn). Among them, the root of S. validus has the best bioaccumulation factors to Cd; P. australis has the best bioaccumulation factor to Cr, Hg, Pb and Zn in its root；for the aboveground, reed has the best bioaccumulation factor to Cd. Meanwhile, we found that L. salicaria has the highest bioaccumulation factor to Cr, Hg and Pb. And S. validus has the best factor to Zn. (3) The five wetland plants have a significant variation for translocation factors to five heavy metals(Cd, Cr, Hg, Pb, Zn). The translocation factors of S. planiculmis for Cd, Cr, Pb and Zn are all the best, of which the translocation factors for Cr and Zn are greater than 1. The translocation factor of T. angustata for Cr is also greater than 1, secondly only to S. planiculmis. The translocation factors of other three species of wetland plants for five heavy metals are all low.