Second infusion pile-forming device of bored pile

The utility model relates to the technical field of filling and forming of a bored pile, and particularly discloses a second infusion pile-forming device of the bored pile. The device comprises a second infusion guide pipe, a hollow tapered end cap of the guide pipe connected at the bottom end opening of the second infusion guide pipe and a discharging hopper connected at the top end opening of the second infusion guide pipe, wherein the hollow tapered end cap of the guide pipe is of a hollow tapered structure, and the bottom end of the second infusion guide pipe can pass through the hollow tapered end cap of the guide pipe, can penetrate through slurry in a cast-in-situ bored pile forming hole and is inserted into primary pouring concrete. According to the second infusion pile-forming device provided by the utility model, the technical problem that the pile extension is likely to fail in the second infusion of the bored pile in the prior art can be solved.