The invention provides a carbon-free tundish coating material, which is prepared from the following raw materials by weight: 20-35 parts of forsterite sand, 20-40 parts of fused magnesia particles, 30-60 parts of fused magnesia fine powder, 2-3 parts of clay powder, 1-3 parts of bentonite, 0.6-2 parts of jute fibers, 0.1-0.2 part of polypropylene fibers and 2-8 parts of a composite additive. The composite additive is a mixture of a binder A and calcium salt, a mixture of silica micro powder, calcium salt and talc powder, or a mixture of a binder A, aluminum dihydrogen phosphate, talc powder and lignosulfonate. The beneficial effects of the coating material are good bonding performance, high normal-temperature and high-temperature strength, long service lifetime, high application thickness,no falling down, no collapse, and no cracking, burst or peeling during baking dehydration.