Clamp tool

The utility model relates to the technical field of aircraft manufacturing, and discloses a clamp tool which is used for clamping a stringer and comprises a base, a connecting hole used for being connected with a machining platform of a machine tool is formed in the base, a plurality of clamp assemblies distributed at intervals in the first direction are arranged on the top face of the base, and the clamp assemblies are detachably connected with the base. The clamp assembly comprises a fixed part and a movable part which are arranged in the second direction, a contact head is arranged at the end, facing the fixed part, of the movable part in a floating mode, and the movable part can be close to or away from the fixed part in the second direction so as to clamp or loosen the stringer located between the fixed part and the contact head. The first direction and the second direction are perpendicular to each other and are both parallel to the top face of the base. The stringer clamp is suitable for clamping strin