The regularity of transportation and accumulation of Pb-pollution in water and in hydrophytes is dealt with in this paper. The results show that the accumulative ability of Pb-pollution of plants is quite different, their order being Myriophyllum spicatum>Spirodela polyrhiza> Hydrocharis dubia>Eichhornia crassipes>Nymphoides peltatum, and that the resistance of plants to Pb-pollution is also very different, their order being Eichhornia era-ssipes->Myriophyllum spicatum>Spirodela polyrhiza>Nymphoides peltatu...