Two-stage telescopic lengthened ram

The utility model provides a two-stage telescopic lengthened ram, and mainly relates to the field of welding equipment. A two-stage telescopic lengthened ram comprises a frame and is characterized in that the frame is mounted on an external rail, sliding assemblies are fixedly arranged on the inner wall of the frame and symmetrically and fixedly arranged on the inner wall of the frame in two rows, a lifting outer ram is slidably connected to the middles of the sliding assemblies, and a rack is fixedly arranged on one side face of the lifting outer ram; a lifting motor is fixedly arranged on one side face, close to the bottom, of the frame, the lifting motor is connected with the rack in a meshed mode, a lifting inner ram is arranged in the lifting outer ram in a sliding mode, and the lifting inner ram vertically moves up and down along an inner cavity of the lifting outer ram through a lead screw movement amplitude. The utility model has the beneficial effects that under the same stroke, the large space is no