Sunken vertical shaft construction device

The utility model relates to a sinking type vertical shaft construction device which comprises a tunneling unit and a lifting unit, the tunneling unit comprises a tunneling body, a supporting assembly and a cutting assembly, the supporting assembly and the cutting assembly are both connected to the tunneling body, and the cutting assembly comprises a first cutting piece, a second cutting piece and a rocker arm oil cylinder. One ends of the first cutting piece and the second cutting piece are rotatably connected with the tunneling body, the other ends of the first cutting piece and the second cutting piece form cutting heads, one end of the rocker arm oil cylinder is connected with the first cutting piece, and the other end of the rocker arm oil cylinder is connected with the second cutting piece. By the adoption of the double-cutting-head structure, the excavation efficiency is higher, excavation is conducted from the middle to the two sides in the excavation process, acting force can be counteracted, and str