Stainless steel rectangular air pipe welding support

The utility model relates to the technical field of stainless steel rectangular air pipes, and discloses a stainless steel rectangular air pipe welding support which comprises two vertical blocks, the two vertical blocks are fixedly connected together through a transverse plate, a movable block capable of sliding is arranged above the transverse plate, two connecting blocks are fixedly installed on the top of the movable block, two clamping blocks are arranged on the movable block, and the two clamping blocks are fixedly connected with the transverse plate. The two clamping blocks are located between the two connecting blocks, the two connecting blocks are provided with second threaded columns capable of driving the clamping blocks to move, the positions of the moving blocks are adjusted front and back, the fixing position of the air pipe is determined, the air pipe needing to be fixed is placed between the two clamping blocks, then the second threaded columns are rotated, the clamping blocks are driven to mo