Hole machining device

The embodiment of the invention discloses a hole machining device which comprises a hollow clamping body, an adjusting device and a machining device. The top end of the clamping body is open, and an adjusting hole and a machining through hole are formed in the side face of the clamping body. The hollow inner cavity is used for accommodating a to-be-processed workpiece; a gland covers an opening in the top end of the clamping body, one side of the gland is movably connected with the clamping body, and the position close to the other side of the gland is detachably connected with the clamping body through a fixing piece. The first adjusting piece penetrates through the gland, enters the hollow inner cavity of the clamping body and can move axially, and a handle is fixed to the top of the first adjusting piece; and the second adjusting piece penetrates through the adjusting hole, enters the hollow inner cavity of the clamping body and can do axial movement. According to the technical scheme, the to-be-machined w