Based on similarity principle and by established geometric similarity ratio 0.28：1 water model

the simulation test on flow field in 63.27 t tundish for two strands 230 mm x 1300 mm slab casting has been carried out to study the effect of channel filter on tundish liquid flow situation. Results show that only with turbulence inhibitor + wall and dam the plug flow area in tundish is relatively smaller and the dead area is rather larger； with placing dam by channel liquid filter the optimization effect is obvious and the installation is simplified with low cost

and the average resident time of liquid in optimized tundish increases from 348.22 s to 400.15 s

the peak time increases from original 172.4 s to 196.0 s and the dead volume decreases from 22.49% to 9.69%.