The invention relates the stove enamel support cobalt chromium alloy containing rare earth La used for teeth. The method uses the electrolysis Co, metal Cr, metal Mo, metal La, metal W, electrolysis Mn, and crystal Si as raw materials, getting the cast ingot by melting them in electric induction furnace. The chemical compositions are following: Cr 15.0-30.0wt%,Mo 4.0-9.0wt%, La 0.03-0.30wt%, Mn 0-2.0wt%, Si 0-3.0wt%, W 0-10.0wt%,C 0-0.2wt% and Co. The alloy can be made with the casting machine, stove enamel furnace, and porcelain. The alloy binding ability is improved because of the rare earth La. The test indicates: alloy bonding strength is 75MPa, strength for extension (ªÊb ) is 800MPa, yield strength (ªÊ0.2) is 680MPa, elongation (ª€5) is 18%, diamond pyramid hardness (HV) is 300-400, coefficient of thermal expansion (ª‡RT-500Deg.C) is 13.4-14.5ª–m/m/Deg.C, and casting shrinkage is 1.8-2.1%. The binding ring and bar, which are cast by cobalt chromium alloy, has the advantages of high intensity and good rebound elasticity. The invention is the ideal material.