Double-sided automatic welding device

The utility model discloses a double-face automatic welding device which comprises two movable jig frames for welding and fixing two welding guns. The movable jig frame is characterized in that the movable jig frame comprises two jig frame bases arranged in parallel, two parallel rails arranged on the jig frame bases and a door-shaped jig frame supporting column arranged on the two parallel rails, the door-shaped jig frame supporting column is composed of two stand columns and a transverse frame fixed to the two stand columns, and idler wheels are arranged at the bottoms of the stand columns through bearings; the jig frame base is further provided with a roller running limiting device, a welding gun moving rail is arranged on a transverse frame of the jig frame supporting column, a hanging support with sliding rolling wheels is arranged on the moving rail, and two welding guns which are oppositely arranged are fixed on the hanging support. The device is not only suitable for welding rib plates of H-shaped com