The accumulation and removal on combined pollution of Cd2+,Cr3+,Cu2+,Zn2+,Ni2+ and Mn2+ in micro contaminated water by submerged plant Potamogeton crispus were studied in small enclosures.Results showed that the removal of heavy metals in overlying water with the growth of P.crispus was significantly higher than that without P.crispus.P.crispus had different abilities to absorb heavy metals tested and super accumulation ability for Cd2+,Mn2+ and Ni2+.Mn2+ enrichment was the most significant indicating that P.crispus is an aquatic plant preferred manganese.The accumulation abilities of heavy metals were diverse among different parts of the plant.The enrichment of Cd2+ was stronger in leaves and the accumulation of Cr3+,Cu2+,Zn2+,Ni2+ and Mn2+ in new leaves were higher than those of the old leaves,roots and stems.