Railway vehicle curve alarm device

The embodiment of the utility model provides a railway vehicle curve alarm device which is applied to a coal mine tunnel, the railway vehicle curve alarm device comprises a magnet, a magnetic detection sensor, a control device, a counter weight and a seesaw, and a railway vehicle is configured to pass through the seesaw along a rail in the direction from a first end to a second end. When the railway vehicle does not pass, the first end of the seesaw is lower than the second end of the seesaw, the magnet is close to the magnetic detection sensor at the moment, and the magnetic detection sensor is located in the magnetic field range of the magnet and can detect existence of a magnetic field; when a railway vehicle passes through the seesaw, the height of the second end of the seesaw is reduced, the height of the first end of the seesaw is increased, the distance between the magnet and the magnetic detection sensor is increased, and the magnetic detection sensor is out of the magnetic field range of the magnet,