Automatic girth welding workbench for water tank

The utility model discloses an automatic girth welding workbench for a water tank, which comprises a water tank middle cylinder and end sockets, the end sockets are arranged on the left side and the right side of the water tank middle cylinder, and the workbench is arranged below the water tank middle cylinder. According to the automatic girth welding workbench for the water tank, through cooperation of the water tank middle cylinder, the end sockets and the workbench, the water tank middle cylinder to be welded is placed above the rolling wheels, the two end sockets are in butt joint with theleft side and the right side of the water tank middle cylinder respectively, and at the moment, a motor supplies power to enable the rolling wheels to rotate; the middle cylinder of the water tank isarranged on the roller and rotates along with the roller under the action of friction force, then the welding gun is started to weld a gap between the middle cylinder of the water tank and the end socket, the welding speed is