Special crane for production of aluminum profile

The invention discloses a special crane for production of an aluminum profile. The special crane comprises a main lifting machine, a bridge frame, a lifting frame, a sliding trolley, a balancing weight and a cab, wherein the main lifting machine is fixed on main beams of the bridge frame via a base; the bridge frame is formed by means of connecting two end beams and two main beams via bolts; the lifting frame is connected with the main beams of the bridge frame via bolts; the sliding trolley is arranged on a vertical fixing track of the lifting frame and is connected with one end of a lifting chain; the balancing weight is connected with the sliding trolley via the lifting chain; and the cab is fixed on the lifting frame at one end of the crane. In actual work, since the sliding trolley is provided with a hook and a lug and the hook has a certain movement range, the aluminum profile can be drained rapidly, the work time is saved and the production efficiency is enhanced; and meanwhile, the balancing weight connected with the sliding trolley is capable of lowering the temperature of the main lifting machine in movement, and the actual work requirement of a factory is satisfied.