The invention belongs to a field of preparation and application technology of porcelain materials in mouth repairing field, in particular to a preparation method for a grads porcelain material with nickel chrome as a metal floor. A porcelain powder which takes leucite as a main crystalline phase is synthesized and the weight percentage for the components of the powder relates to 66.67 percent of SiO2, 16.57 percent of Al2O3, 12.81 percent of K2O, 2.64 percent of Na2O, and 0.89 percent of others. Grads adjusting components are added in the porcelain powder and the weight percentage of the components relates to 30 to 40 percent of Ni, 10 to 20 percent of Cr, 0 to 10 percent of NiO and 40 to 50 percent of Cr2O3. The porcelain powder added with the grads adjusting components is molded with a layer accumulation method and is agglomerated. The prepared component grads porcelain material is characterized by easing the heat stress between gold and porcelain and improving the intensity, and lays a foundation for the clinic application of mouth porcelain repairing.