The utility model discloses a universal turning tool bar, and belongs to the technical field of lathe machining and positioning. The universal turning tool bar comprises a tool bar body, a sliding block, a tool, a tensioning mechanism and an adjusting mechanism. A first rack is arranged on the side edge of the end of the cutter bar, a second rack is arranged at the first end of the sliding block,a cutter is arranged at the second end of the sliding block, and the first rack is meshed with the second rack. The tensioning mechanism penetrates through the cutter bar, the first rack and the second rack and is arranged in the sliding block; the first end face of the adjusting nut makes contact with the end of the cutter bar and the sliding block, the stop nut makes contact with the second endface of the adjusting nut, and the first end face of the adjusting nut is opposite to the second end face of the adjusting nut. The screw sequentially penetrates through the stop nut and the adjustingnut to be in threaded connection with the sliding block. The universal turning tool bar is used for limiting in the transverse direction, is high in positioning precision, can only move in the heightdirection, avoids the influence on the transverse position in the center height alignment process, is convenient and fast to operate, and improves the working efficiency.