The present invention relates to a processing method for a vacuum container and a vacuum container, characterized in that, the processing method for a vacuum container comprising a step of welding a sealing fin, wherein welding a sealing fin onto an inner wall of an outer container, and leaving an empennage for welding at the bottom of the outer container; and a step of welding an outer bottom cap, wherein welding an outer bottom cap seamlessly on the empennage by means of argon arc welding. In accordance with the present invention, the sealing fin is welded on the outer container and an empennage for welding is left at the bottom of the outer container, and the outer bottom cap is welded by means of argon arc welding to the empennage, thus the heat preservation effect of the vacuum container can be ensured and no interlayer nor seam exists between the outer bottom cap and the outer container, the outer bottom cap and the outer container can be closely connected and integrally formed, and the vacuum container is easy to wash and use.