The invention relates to a capacitor energy storage welding forming method for a cone metal shell and thermocouples. The method comprises the steps that a through hole is formed in a position, where the temperature is about to be measured, of the metal shell; the thermocouples are fixed to the inner wall of a temperature-measuring buckle plate through copper electrodes; flexible electrodes are closely attached to the outer wall of the temperature-measuring buckle plate, wherein the shape of the temperature-measuring buckle plate is matched with that of the through hole; the temperature-measuring buckle plate is assembled in the through hole; a capacitor discharges electricity to the copper electrodes and the flexible electrodes so that the temperature-measuring buckle plate and the metal shell can be fixed through capacitor energy storage welding. By means of the welding forming method, the operation difficulty of welding the thermocouples to the metal shell is reduced, and the weldingquality stability of multiple thermocouples on the inner surface of the metal shell is improved.