When sediment-laden flow met clear water, it would dive into the bottom and kept on moving forward under particular condition because of its high density. Such Flow was a special form of sediment movement and named as density current. Based on the water-sediment two phase flow theory, this study Treated the turbid water as one phase homogeneous pore fluid. By sloving the ASM（Algebraic Slip Mixture）model , which included momentum, continuity equations for the mixture, the volume frraction eauations for the secondary phase and algebraic expressions for the relative velocities, the water-sediment two phases flow could be solved by such ASM model coupled with standard k-ε equations. This paper also introduced the relative verification test and multiphase experiment flume. By the analysis of the test result and applicability of the model, the conclusion had been made. Such coupling model can effective simulate the flow diving, head morphology and advance speed and more accurate for the situation of Re number above 2000 and sediment concentration above 1kg/m3. This study would provide a new method for the density current research relative to reservoir, lake and river entrance.
