The invention discloses a sliding-type tool special for positioning a clamp screw hole. The tool comprises a framework, wherein the framework is a square frame which is formed by connecting two transverse staff gauges and two longitudinal staff gauges; the surfaces of both of the longitudinal staff gauges and the transverse staff gauges are provided with scale marks; a transverse sliding chute is reserved inside both of the transverse staff gauges; a vertical sliding chute is reserved inside both of the longitudinal staff gauges; a transverse caliper is arranged between the two transverse staff gauges; a second through slot is reserved on the transverse caliper; a transverse sliding block is respectively arranged at the two ends of the transverse caliper; a transverse guide block is respectively arranged on the two transverse sliding blocks; the two transverse guide blocks are respectively matched with the two transverse sliding chutes; a vertical caliper is arranged between the two longitudinal vertical staff gauges; a first through slot is reserved on the vertical caliper; a vertical sliding block is respectively arranged at the two ends of the vertical caliper; a vertical guide block is arranged on each vertical sliding block; the two vertical guide blocks are respectively matched with the two vertical sliding chutes; and both the vertical sliding blocks and the transverse sliding blocks are provided with scale mark pointers.