High-erosion-resistance coating for tundish lining

The invention discloses a high-erosion-resistance coating for a tundish lining. The high-erosion-resistance coating comprises the following raw materials in percentage by weight: 50-65% of fused magnesite, 10-20% of magnesium oxide fine powder, 3-9% of metal aluminum powder, 2-5% of combined clay, 3-8% of rho-Al2O3, 2-5% of sodium lignin sulfonate and 1-4% of SiO2, in the fused magnesite with the granularity of more than 0.1 and less than or equal to 3mm, 30-70% of fused magnesite with the granularity of more than 1 and less than or equal to 3mm and 30-70% of fused magnesite with the granularity of more than 0.1 and less than or equal to Under the condition that the normal-temperature breaking strength is not lower than 12.5 MPa, the porosity is improved to be not higher than 19.6%, the 1500-DEG C linear change rate ranges from-0.72% to-1.0%, the volume density is 2.30 g/cm < 3 >, the normal-temperature compressive strength is not lower than 72.5 MPa, the 1500-DEG C thermal-state breaking strength is not lowe