Braking device used for railway vehicle

The invention discloses a braking device used for a railway vehicle. The rail vehicle comprises a body (1) and wheels (2), and the braking device comprises a buffer (5) and a friction block (11). The buffer (5) is arranged at the tail end of a railway through a support (6), the friction block (11) is arranged in front of one wheel (2) and can be mounted on the vehicle body (1) movably along the direction opposite to the running direction and corresponds to the buffer (5). According to the above technical scheme, when the railway vehicle runs into the buffer, the friction block contacts with the buffer while the buffer presses the friction block and the wheel, the larger the shrinkage of the buffer is, the larger the friction force between the friction block and the wheel is. Accordingly, during shrinkage of the buffer, the buffer and the friction block can brake the railway vehicle, braking distance is greatly shortened, the buffer is protected and the like accident that the railway vehicle runs out of the ra