The technical principles, characteristics, composition and planting techniques of 2 kinds of floating phytoremediation systems made with bamboo and degradable polyfoam plate were described. The growth of Canna generalis, Cyperus alternifolius, Vetiveria zizanioides, Ipomoea aquatica, Cuphen hyssopifolia, Coleus scutellarioides, Sanchezia nobilis, Cyathula prostrata and the purification effects on N and P in piggery wastewater by these plants cultivated in the systems were also investigated. The results showed that the floating phytoremediation system was simple to install and manage, and durable too. Canna generalis, Vetiveria zizanioides, Ipomoea aquatica and Cuphen hyssopifolia had good purification effects on N and P in piggery wastewater. These systems have prospects for a vast range of application in purifying wastewater.