The invention discloses a fixation method capable of implementing quick replacement of a vacuum furnace crucible. The method comprises a crucible fixation clamp, a heat insulating sleeve and a formed crucible, wherein the formed alumina heat insulating sleeve is arranged on the inner layer of a coil; the crucible is arranged in the heat insulating sleeve; and the side wall of the crucible is welded with a stainless steel plate which is connected with a fixing device. The method overcomes the defects of long crucible replacement time, complex replacement procedure and the like in the smelting process. By using the method, the new crucible can be quickly replaced after each fusion casting process, and the replacement way of the integral cradle by reheating and drying the heat insulating material is avoided, thereby greatly enhancing the smelting production efficiency and greatly lowering the production cost.