Portable rail clamping device of gantry crane

The utility model discloses a portable rail clamping device of a gantry crane, which is characterized by comprising two side plates (1), the lower parts of the side plates (1) are movably connected with one end of a rail clamping device (3) through fixing rods (2), the other end of the rail clamping device (3) is provided with a clamping groove (4), the middle of the rail clamping device (3) is connected with a fastening screw (5) and a nut (6), and the upper parts of the side plates (1) are provided with limiting rods (7). Two steel plates are welded on the supporting legs, the rail clamping device is fixed up and down through nuts, the upper nut is arranged to be a movable nut so that the rail clamping device can be taken out conveniently, and the middle of each steel plate is arc-shaped so that the steel plates can be taken out conveniently. According to the rail clamping device, the time for an operator to install the rail clamping device every time is saved, and the potential safety hazard caused by the