Water modeling and the numerical simulation were applied to study the fluid flow in a two-strand asymmetric tundish. Mathematical simulation results showed that the geometric structure of turbulence inhibitor is a key factor to affect the fluid flow in the tow-strand asymmetric tundish. In the case of the circular turbulence inhibitor, the vortex center of flow field is near the bottom of the turbulence inhibitor, and the fluid flows vertically at the exit the of the turbulence inhibitor. The vortex is near the shroud, and the vortex center has the same height as the dam, so there is greater surface vibration, and sometimes slag entrapment occurs. The bottom of asymmetric square turbulence inhibitor has the wave form, and the vortex center is near the exit of the turbulence inhibitor, and the fluid flow obliquely at the exit the of the turbulence inhibitor. Because the exit area at the right side of the turbulence inhibitor is greater than that at the left side, the fluid flow rate at the right side is greater than that at the left side. And the larger the exit area of the turbulence inhibitor, the less the exit velocity of the fluid, and the more stable the free surface of the tundish. Water modeling showed that the difference of the average residue time between two strands in the case of asymmetric turbulence inhibitor is only 3/4 in the case of circular turbulence inhibitor, and the arithmetic mean of the average residue time increase 5.3 percent. All these facts indicated the asymmetric turbulence inhibitor can get rid of the inclusions effectively and decrease the difference of fluid flow between two strands.