Abstract: Based on the N-S equation and the universal k-ε turbulent model,taking the character of therma and saline stratified flow and the effects of buoyancy on turbulence into account,the k-ε model of therma and saline stratified flow is established.Density stratified flow with both the vertical temperature gradient and the vertical salinity gradient is simulated numerically,in which turbulent terms are calculated by the k-ε turbulent model.The distributions of velocity,temperature and salinity are given in this paper.The feature of stratification and turbulence is described correctly by the rmdel.The computational results agree well with the experimental data.