The utility model relates to steel rolling ancillary equipment in metallurgy industry, in particular to an insulating block for a continuous casting blank. The technical proposal is that an insulating cover comprises a framework 1, a steel plate 2, a fiber mat 3 and a steel mesh 4, the framework is an opening type cover shape, the steel plate is fixed on the framework, and a cover body is formed, the steel mesh is fixed inside the cover body, the fiber mat is arranged between the steel plate and the steel mesh, and the fiber mat is clung on the steel plate through the steel mesh inside the cover body. The insulating cover for the continuous casting blank is manufactured matching with the size of a carrier vehicle and covered on the hot charging continuous casting blank on the vehicle body, because the fiber mat is heat retaining and heat insulated, the heat loss of the continuous casting blank during transportation can be decreased, the temperature can be improved up to 200 DGE C to 400 DEG C compared with the prior art without utilizing the utility model, the energy-saving effect is obvious, the utility model has the advantages that the structure is simple, the operation is convenient and the heat loss of the continuous casting blank during transportation can be decreased, the energy consumption can be reduced and the production cost can be decreased.