Influence of inlet velocity and pouring temperature of the metal melt on flow field in the copper stave in metal-sand molds was simulated using a finite element software ANSYS. The results reveal that obvious disturbance on the curves of filling velocities can be observed in condition of lower inlet velocities,such as 0.3 m/s and 0.8m/s,while absence of disturbance on the filling velocity curves can be observed with inlet velocity of 1.0 m/s,exhibiting smooth filling process,which can be used for the recommended value of pouring parameters during practical production. Varied-viscosity was adopted in the numerical simulation to predict the effects of pouring temperature on filling velocities. It is found that with increasing in pouring temperature,the filling velocity of metal melt is obviously accelerated,which is beneficial for obtaining larger velocity gradient.