Special adjustable machining device aiming at insufficient stroke of boring machine

The utility model belongs to the technical field of excavator machinery. The utility model provides a special adjustable machining device aiming at insufficient stroke of a boring machine, which comprises a rail bottom plate and an upper positioning tool, a linear slide rail is arranged on the rail bottom plate, and a linear slide block matched with the linear slide rail is arranged at the bottomof the upper positioning tool; a limiting block is also arranged on the rail bottom plate; the limiting block is located outside the linear sliding rail and close to one side of the rail bottom plate,a lower limiting hole is formed in the limiting block, a limiting plate parallel to the bottom face of the upper positioning tool is further arranged at the bottom of the upper positioning tool, an upper limiting hole is formed in the limiting plate, and the upper limiting hole and the lower limiting hole are the same in size. The stroke of an existing boring machine is increased, the utilizationrate of the boring machine