Mn deficiency of wheat is a main problem of plant nutrition in Sichuan Province,which was considered to be relation closely with paddy-upland rotation. An experiment with model soil-column was conducted to study the characteristics of Mn movement and its uptake by rice (Oryza sativa L.) in two alluvial soils under different water and fertilization status.It was found that soil active Mn (easily reducible Mn) decreased while DTPA-Mn and exchangeable Mn increased as soil was waterlogged, which caused the Mn leaching through 1 meter soil column and its excessive uptake by rice plant. The total storage of available Mn thus decreased. The effect of water and fertilization on Mn followed the following the following sequence: CK>NPK and NPKM (the above treatments were waterlogged)>>Wetting with NPK fertilizer (NPKM/Wet). The sequence of DTPA-Mn and exchangeable Mn in soil layers (especially 0-20cm) was CK and NPK>NPKM>>NPKM/Wet>the original upland soil, but active Mn in soil was reverse. This phenomenon was more obvious in gray alluvial soil than in gray-brown alluvial soil. It showed that Mn is an active element which is easily affected by water and fertilization status, and wetting treatment can slow down the Mn transformation in soil and decrease the uptake of Mn by rice plant greatly. Therefore, to adjust the transformation of Mn in soil and its availability to plant through the management of water status woutd be practicable.