Four types of underwater plants were tested to see how well they can remove cadmium from polluted sediment. The plants were checked for their ability to tolerate cadmium and their capacity to accumulate it. Results showed that Hydrilla verticillata and Elodea canadensis were the best at handling cadmium pollution. Potamogeton crispus was the most effective at accumulating cadmium at low pollution levels. Ceratophyllum demersum didn't do as well due to its weak root system. Hydrilla verticillata was good at transporting cadmium above ground, while Potamogeton crispus mainly stored it in its roots. For fixing cadmium pollution, Hydrilla verticillata and Potamogeton crispus are recommended. Hydrilla verticillata's above-ground part should be removed, while Potamogeton crispus should be uprooted regularly.