Abstract: The effects of various dewatered sludge loadings (0, 165, 330, 495 and660 t/hm² respectively) in soil on growth of Canna were studied. The effects of sludge applying and Canna planting on heavy metal contents in the soil were alsostudied. The results showed that the Canna couldn't survive with 660 t/hm² sludge loading; when the loading was between 165～495 t/hm², the Canna growth patterns exhibited a pronounced positive growth response. The sludge application caused increase in heavy metal concentrations in the soil, but after Canna planting, the concentrations of Cd and Ni had decreased significantly, with little decrease in Zn concentration. It can be concluded that Canna can be used for phytoremediation of sludge and sludge can be used to amend lean soil.