The high silicon -oxygenal fiber grid cloth and mold yarn mesh are used as the substrate. The surface coating is coated with a high temperature -resistant coating. The casting waste rate caused by slag clamping, pores and other factors can effectively improve the quality of casting and the qualification rate of casting, and the effect is obvious; it has the characteristics of good high temperature resistance, metal resistance, low air volume, etc., and the filtration residue effect is good, and the economy is convenient.