Beam lifting frame

The utility model discloses a beam lifting frame. The device is of an n-shaped structure and comprises a main beam, two buttresses and four jacks, the buttresses are arranged on the lower portions of the two ends of the main beam respectively, each buttress comprises a bottom plate, two supporting steel pipes and a sand cylinder are fixedly arranged on the upper portion of each bottom plate, the supporting steel pipes are filled with concrete, a frame plate is arranged on the upper portions of the two supporting steel pipes, and the sand cylinder is arranged on the frame plate. The two jacks are arranged on the frame plate, the sand cylinder comprises a fixed cylinder body fixed to the bottom plate and a movable cylinder body movably sleeved with the fixed cylinder body, the fixed cylinder body is filled with sand, a sand discharging opening is formed in the lower portion of the cylinder wall of the fixed cylinder body, the movable cylinder body is filled with concrete, and the sand discharging opening is com