Damper for fabricated building

The utility model discloses a damper for a fabricated building. The utility model belongs to the technical field of fabricated buildings. The damper comprises a main cylinder barrel and a damping device arranged in the main cylinder barrel, a plurality of branch cylinder barrels are connected to the outer circumferential surface of the main cylinder barrel, pistons and piston rods are arranged inthe branch cylinder barrels, the piston rods are fixedly connected with the pistons and penetrate out of the sealing covers from inner cavities of the branch cylinder barrels, and the ends, located outside the branch cylinder barrels, of the piston rods are connecting ends. The piston rods of the left branch cylinder barrels are respectively connected to a building; when the damper is used, the piston rod of the right sub-cylinder barrel is connected to another building or the ground, at least two connecting points are arranged on each of the two sides, so that a building section between the two connecting points on e