Boring and milling machine special for boring and milling large-diameter hole in large steel structure

The utility model relates to a special boring and milling machine, in particular to a boring and milling machine special for boring and milling a large-diameter hole in a large steel structure. The boring and milling machine comprises a boring and milling power head, a universal spindle coupling, a boring row, a boring row shaft sleeve, a large-diameter hole face milling tool, a large-diameter hole boring tool, a left boring row shaft sleeve support, a middle boring row shaft sleeve support and a right boring row shaft sleeve support. The boring row is connected with the boring and milling power head through the universal spindle coupling, the boring row shaft sleeve is matched with the boring row and is fixedly connected with a machined workpiece and the ground through the left boring row shaft sleeve support, the middle boring row shaft sleeve support and the right boring row shaft sleeve support in a borne mode, and the large-diameter hole face milling tool is fixedly connected with the boring row through a pair of semicircular hinged shaft clamps. The large-diameter hole boring tool is fixedly connected with the boring row through a pair of semicircular hinged tool clamps. The boring and milling machine special for boring and milling the large-diameter hole in the large steel structure is simple in structure, high in work efficiency and low in machining cost.