Automatic rotating full-length welding machine for gas shielded welding

The utility model provides a gas shielded welding autorotation full-length welding machine, which comprises a base, a working table plate, a rack, a top frame, a welding gun, a protective gas storage steel cylinder and a gas outlet nozzle, a workpiece fixing device is arranged on the working table plate, a lifting mechanism is arranged below a workpiece supporting plate, the workpiece supporting plate is fixedly connected with the lifting mechanism through a connecting frame, and the working table plate is fixedly connected with the lifting mechanism through the connecting frame. A heat dissipation fan is mounted between the connecting frames on the left side and the right side, a plurality of heat dissipation through holes are evenly formed in the workpiece supporting plate, the first workpiece fixing device comprises a first mounting frame, a first rotating motor and a first clamp, and the output end of the first rotating motor is connected with the first clamp; the second workpiece fixing device comprises