Effects of irrigation water quality on salt-water dynamics of red-brown earth and perennial pasture production were studied.Irrigation water with salinities of 100,1500 and 3000mg/L and six different irrigation treatments were adopted in the experiment.Salt was accumulated in the soil during the season of irrigation with water of high soluble salt concentration and partly leached away during irrigation with water of low soluble salt concentration and winter rainfall.The total soluble salts,chloride and sodium ions,appeared to be higher in the 60-90cm horizons than other horizons in the soil profile due to repeated accumulation and leaching and the low permeability of clay horizon.The sodium adsorption ratio (SAR) of the soil and the salt concentration of the white clover shoots increased with the soluble salt concentration of irrigation water.Pasture yield was not significantly affected by irrigation water with a salt concentranon up to 1500mg/L and only reduced by about 9% to 17% at the salt concentration of 3000mg/L under different irrigation conditions.It is evident that irrigation management could play a certain role in regulating salt-water dynamics of soils.