Abstract: Disclosed are a railway vehicle and a storage battery circuit breaker box thereof. The storage battery circuit breaker box comprises a circuit breaker box body, where mounting bases are arranged on side walls of the circuit breaker box body; a mounting positioning plate and a waterproof protection plate are fixedly mounted on a surface of one side of the circuit breaker box body; the mounting positioning plate is of a rectangular annular structure with an opening provided in the bottom thereof; the waterproof protection plate is located at the inner side of the mounting positioning plate; the waterproof protection plate is of a door-shaped structure; and perspective windows and a switch mounting hole are provided at the circuit breaker box body. The circuit breaker box can be mounted inside a vehicle body, maintenance by maintenance personnel outside the vehicle is facilitated, and the sealing requirements can also be met.