Welding device and method for guide pipe leg annular plate

The invention discloses a welding device and method for a guide pipe leg annular plate and relates to the technical field of welding, the welding device comprises a supporting base and a welding gun, the welding gun is fixedly arranged at the upper end of a moving plate, the interior of a moving box is hollow, a plurality of rolling wheels are arranged at the lower end of the moving box, and guide rails are arranged on the rolling wheels in a matched mode; a pushing assembly for conveniently pushing the moving box to move is arranged at the lower end of the moving box, a clamping mechanism for conveniently clamping the annular plate is arranged in the moving box, and a guide mechanism for conveniently guiding the mounting plate to be tightly attached to and separated from the upper end of the supporting box is arranged at the upper end of the mounting plate. The annular plate can be conveniently clamped and the inclination angle of the annular plate can be conveniently adjusted through the clamping mechanism,