Tool clamp for rail transit accessory machining

The invention relates to the technical field of clamps, and discloses a tool clamp for rail transit accessory machining, which comprises a mounting plate, the upper surface of the mounting plate is rotatably connected with a base through a bearing, a limiting assembly is arranged between the base and the mounting plate, and the upper surface of the base is fixedly connected with a clamp seat. A cavity is formed in the clamp base, two movable plates are arranged on the left side and the right side in the cavity through adjusting assemblies, two vertical rods are arranged between the left movable plate and the right movable plate, the top ends of the vertical rods penetrate through the upper surface of the clamp base and are provided with first clamping assemblies, and the vertical rods are slidably connected with the clamp base. According to the fishplate turning device, front-back exchange of a fishplate can be completed, operation is easy, secondary clamping is not needed, the upper side, the left side and t