Narrow-gap large-angle welding gun and using method thereof

The invention discloses a narrow-gap large-angle welding gun, and relates to the technical field of narrow-gap welding guns, the narrow-gap large-angle welding gun comprises a welding gun mechanism, an auxiliary mechanism is arranged on the welding gun mechanism, the auxiliary mechanism comprises a hollow block, a correction pipe is fixed to the bottom of a top cover, and a first single-hole plate is fixedly connected to the position, close to the bottom, of the interior of the hollow block in a sleeving mode; two symmetrical flow guide plates are fixed to the top of the first single-hole plate, a second single-hole plate is fixedly connected to the middle of the interior of the hollow block in a sleeving mode, a third single-hole plate is fixedly connected to the position, close to the top, of the interior of the hollow block in a sleeving mode, and arc-shaped rubber blocks are connected to the arc surfaces of the inner walls of the two arc-shaped blocks in an adhesive mode. According to the narrow-gap large