It is a new trend to develop urban by applying LID technical measures in order to alleviate flooding, water depletion and water pollution issuses in cities. Plant is the key part in LID technical measures, whose tolerances to submergence and barren soil, and water purification capacity are key points to decide the operation effect of LID technical measures. Three kinds of amphibious plants of Canna indica L. , Iris pseudacorus L. and Typha angustifolia are chosen as study objects. Their tolerances to barren soil and their capacities to purify water are tested by experiments. The study results indicate that these three plants may grow well in three kinds of artifical soils whose composition ratios of native red soil in Xiamen, sand and humus soil vary from 10∶9∶1 to 18∶1∶1. All of these three kinds of plants have good water purification capacities. The removal rates of COD of these three plants are all beyond 90%, and the removal rates of TN and NH₃-N are all more than 80%. Besides, the removal rates of TP of Iris pseudacorus L. and Typha angustifolia are almost 100%.