The invention relates to a large-span telescopic universal tower head fixture. The large-span telescopic universal tower head fixture comprises an intermediate beam, two sleeve beams, hook bolts and tackle rope hanging rods. The two sleeve beams are symmetrically and movably connected to the two sides of the intermediate beam. U-shaped connectors are connected to the tail ends of the sleeve beams, and each U-shaped connector is provided with a horizontal screw hole and vertical screw holes. The hook bolts are connected with the U-shaped connectors through the vertical screw holes. The tackle rope hanging rods are connected with the U-shaped connectors through the horizontal screw holes. The large-span telescopic universal tower head fixture comprises the intermediate beam and the two sleeve beams, and the two sleeve beams are symmetrically arranged on the intermediate beam in a sleeved mode and connected with the intermediate beam through locking bolts so that the length of the portions, sleeved with the sleeve beams, of the intermediate beam and mutual dependence of stress of the two sides can be adjusted, the large-span telescopic universal tower head fixture is suitable for the widths of all cross arm heads. Due to the structure that the sleeve beams are connected with the U-shaped connectors, the intensity of pressure is increased, force bearing points of main cross arm materials can evenly bear force, and deformation caused by overlarge stress will not occur.