Inner container welding tool

The utility model relates to the technical field of assembly tools, and discloses an inner container welding tool which comprises a base and a frame structure. The frame structure comprises a bottom frame and a pressing plate structure, a containing space is formed in the bottom frame, the first inner container and the second inner container are both arranged in the containing space, and the pressing plate structure can limit the first inner container and the second inner container in the containing space. The bottom frame is rotationally connected with the base, the frame structure can be overturned by a preset angle relative to the base, so that the front faces or the back faces of the first inner container and the second inner container face upwards, the front faces are used for welding inner container supports, and the back faces are used for welding inner container connecting plates. Two-side welding of the double inner containers can be achieved through the overturning frame structure, the assembling ef