Parking device of rail transportation flat car

The utility model provides a rail transport flat car parking device which comprises a car body, moving wheels are installed at the four corners of the bottom of the car body and move along a T-shaped rail, braking assemblies for braking and stopping the moving wheels are arranged at the positions, located on the two sides of the moving wheels, of the bottom of the car body, and clamping assemblies for clamping the two sides of the T-shaped rail are arranged on the two sides of the moving wheels. A driving assembly for driving the clamping assembly to move horizontally and vertically is arranged at the bottom of the trolley body, and due to the fact that the thickness of the triangular wedge block is larger than the action line of the inclined plate, when the L-shaped plate moves horizontally and breaks away from the clamping effect on the rail, the inclined plate and the triangular wedge block slide horizontally, sliding connection can still be kept, and the position of the brake block is limited. The clampin