Counter bore hexagon socket screw dismounting tool

The utility model provides a dismounting tool for a counter bore hexagon socket screw. Comprising a bit body, the bit body is provided with a driving end and a working end, the driving end is provided with a connecting structure, and the bit body is connected with a driving device through the connecting structure; the limiting structure is connected with the working end of the bit body, the limiting structure at least comprises a stretching assembly and an anti-falling assembly, the fixed end of the stretching assembly is fixedly connected with the bit body, the free end of the stretching assembly is telescopically arranged in the length direction of the bit body, and the anti-falling assembly is connected with the free end of the stretching assembly; the anti-falling assembly is used for limiting and fixing the inside hexagonal bolt; and the driving device drives the bit body to rotate, and the stretching assembly drives the anti-falling assembly to move in the length direction of the bit body, so that the i