Method for welding part to be welded through side wall welding flux hanging structure

The invention relates to a method for welding to-be-welded parts through a side wall welding flux hanging structure, in particular to a technological method for solving welding seam defects in vacuum welding through the side wall welding flux hanging structure, the to-be-welded parts at least comprise a first to-be-welded part and a second to-be-welded part, and a welding seam is arranged on the contact face of the first to-be-welded part and the second to-be-welded part. A welding flux hole is formed in the surface of the first to-be-welded part, an opening facing the second to-be-welded part is formed in the welding flux hole, and welding flux is placed in the welding flux hole; the temperature is increased to reach the welding temperature, and the welding flux flows into a welding area between the two adjacent to-be-welded pieces under the capillary action after being molten; the molten state of the solder is kept, vacuumizing treatment is conducted, and bubbles wrapped in the liquid solder overflow; and c