In order to reveal absorption and distribution of phosphorus under from under arsenic. By the method of arsenic addition, the concentration gradient of arsenic in the sediment was set 0, 50, 100, 150, 200, 400 and 600 mg kg−1. To investigate the absorption and distribution of different parts of Typha at different arsenic concentrations. The results show: (1) With the increase of arsenic concentration in the sediments, Typha on phosphorus absorption was first increased and then decreased. The absorption of arsenic also increased first, then decreased and tended to be stable, and the absorption of phosphorus and arsenic reached the peak under 150 mg kg−1 stress. Add different concentrations of arsenic affected the absorption of phosphorus and arsenic in Typha, may be related to the biomass of plants. (2) The uptake of phosphorus in the aerial part of Cattail was significantly higher than that of the root, while the absorption and accumulation of arsenic were opposite.