Water regime in paddy soil is one of the main factors which dominate the eluviation and muviation of mineral elements and affect the yield of rice and wheat.A preliminary study was made by modelling soil column experiment for the influence of soil water regime on the eluviation and illuviation of mineral elements in soil and their differentiation in soil profile,as well as its relation to the growth of rice and wheat.Experiment showed that the content of dissolved oxygen in soil column was restricted by the soil water condition;the more the amount of percolating water,the more the dissolved of water oxygen in soil;and the average value of Eh in soil was lowered with the decrease of percolation.