Abstract: The fluid flow of molten steel in the continuous casting mould for compound roll has been simulated numerically using the κ-Ε double equation model of turbulence to discuss the effects of casting speed and pouring angle on the fluid flow. The results showed that the molten steel enters into the mould assembly in three flows of which the two move upward peripherally at the same time to form symmetrically two eddies at the upper part of the mould, while the other one moves downward peripherally and, eventually, goes out of the mould at the speed about the same. And the eddy center moves downward with increasing casting speed. At the same casting speed, the eddy center is the lowest if the pouring angle is about 60° and the penetrating depth of molten steel flow increases with the increasing pouring angle. The scouring velocity of the molten steel against roll core is the highest and lower when the pouring angle is 15° and 90°, respectively.