It was to clarify the effect of Corbicula fluminea or algae under physical and Chironomus plumosus combined disturbance on regeneration and transformation of internal phosphorus(P), using the sediment and overlying water from Meiliang Bay, Tai Lake. The variation of P forms in the overlying water, pore water and sediments was analyzed. The results showed that the concentration of Total P(TP), Dissolved total P(DTP), Dissolved inorganic P(DIP), Particulate P(PP) in the overlying water under combined disturbance with the Corbicula fluminea or algae were obviously higher, compared with that under combined disturbance, and they could result in the decrease marked for DIP in the pore water. In addition, the peak area of DIP migrated deep(from 3~4 cm to 4~5 cm under 0 cm) dued to Corbicula fluminea or algae, but the control was not. The content of NH₄Cl-P and the percentage of Fe/Al-P to Total P in the sediment(0~4cm) decreased and the Fe/Al-P increased due to Corbicula fluminea or algae, and the effect of Corbicula fluminea or algae on the NH₄Cl-P decreased and Fe/Al-P increased was the same nearly. Under different disturbance factors, the contribution of Chironomus plumosus on the DTP and DIP in the overlying water was big. One explanation was it reduced the DIP in the pore water and the NH₄Cl-P in the sediment. It was suggested that Corbicula fluminea or algae under combined disturbance could improve the internal P release and migration.