Forward reaming device for vertical shaft

The invention relates to a forward vertical shaft reaming device which solves the problems that reverse pulling construction is inconvenient to position, a drill rod and a drill bit are heavy, energy consumption is high and efficiency is low. Comprising a winch, a lifting lug section, an oil cylinder section, a power section, an upper cutting tooth section, a lower cutting tooth section and an electricity-water integrated pipeline, two sets of supporting shoes are axially arranged on the inner wall of a first cylinder of the lifting lug section, during working, piston rods of first oil cylinders extend outwards, the two first supporting shoes extend outwards at the same time to be tightly supported on the well wall, the oil cylinder section is composed of a plurality of vertical second oil cylinders, and the power section is arranged on the second oil cylinders. The upper end of a second oil cylinder is connected with the lower end of the first cylinder, the lower end of the second oil cylinder is connected w