To simulate concrete composed of fluidsolid multiphaseflow,a simplified numerical simulation based on quasifluidsolid twofluid model is put forward.It regards the particulate matter in concrete (stones and gravel) asquasifluidflow .Based on the EulerEuler model,each phase has its own momentum equation and continuity equation.The coupling coefficient of each phase is solved through pressure,volume exchange coefficient and surface coefficient and the simplified numerical simulation in concrete multiphase mixing drum is realized.In the numerical mixing drum design process,this method provides a quantized,visualized design model for improving the mixing performance.By the test,the model proves sound indirectly.