The invention relates to the technical field of industrial welding equipment, and discloses a full-automatic argon arc welding machine. The full-automatic argon arc welding machine comprises a base. An adjusting mechanism, a stabilizing mechanism and a welding mechanism are installed on the surface of the base. A first motor fixed to one side of the top end face of the base is arranged in the adjusting mechanism. An output end of the first motor is connected with a first rotating shaft, and the other end of the first rotating shaft is connected with a clamp through welding. In the present invention, under the action of the adjusting mechanism, through arranging two clamps, second welding pieces of different structures such as pipelines or plates can be clamped and fixed, through arranginga hydraulic rod, the distance between the clamps can be adjusted, so that the second welding pieces of different sizes are welded, the clamps can rotate under the cooperative use of the first motor, the first rotating shaft, the clamps, a second rotating shaft and a vertical plate, the second welding pieces are subjected to circular motion welding, the welding efficiency is improved, and the applicability is enhanced.