Double-station alternate working welding machine

The utility model relates to a double-station alternate working welding machine which comprises a machine table and a cross beam fixedly arranged on the machine table, and the cross beam stretches across the upper portion of the machine table. Two parallel first linear modules are arranged on the machine table, jigs for bearing materials can be placed on sliding tables of the first linear modules, and the direction of the first linear modules is perpendicular to the direction of the cross beam; two second linear modules are arranged on the cross beam in the length direction of the cross beam, and a work executing mechanism is arranged on the two second linear modules. According to the double-station alternate working welding machine, a double-station mode is adopted, under the condition that only one welding head and one detector are arranged, materials on the two stations are alternately machined and detected through the welding head and the detector, the time difference of material transferring is eliminate