The utility model relates to a composite dreg retaining wall with holes for a tundish, which consists of a retaining wall body and a mosaic, wherein the mosaic is arranged on the retaining wall body and is provided with steel tapping holes; the retaining wall body is made of an aluminium-magnesium material, silicon-alluminiium material, high-aluminium material, magnesium material or magnesium-aluminium material; and the mosaic is made of a corundum material. The composite dreg retaining wall with the holes adopts a composite mosaic method; on the basis of slightly increasing material cost, the service life of part with the holes is further improved, and is made to synchronous with that of the dreg retaining wall; meanwhile, the change of a flow field of molten steel of the tundish caused by deformation of the steel tapping holes is avoided; and in the production process, functions of unifying temperature of the molten steel and removing inclusion of flow control devices such as the dreg retaining wall of the tundish can be effectively realized, and the requirement of a steel mill on improving continuous casting heats is met.