Turntable reinforced single-arm crane

The utility model discloses a turntable reinforced single-arm crane, and relates to the technical field of crane operation. A horizontal fixing semi-ring is welded to the annular side of a cylinder, a plurality of vertical through holes which are evenly distributed are formed in the fixing semi-ring, a plurality of sleeves which are evenly distributed are welded to the annular side of the cylinder, and pipe end nuts are welded to the outer ends of the sleeves. The vertical screw rod is installed at the vertical through hole of the fixed semi-ring in a matched mode, the vertical structure is provided with a transverse through hole which is transversely formed, a transverse fixing bolt is installed at the transverse through hole of the vertical structure, and the side end of the transverse fixing bolt is installed at the positions of the pipe end nut and the sleeve. An upper mounting base plate is fixedly mounted on the lower side of the rotary table mechanism, an upper fixing frame is connected to the lower si