Railway case defrosting moisture-proof device

The invention discloses a railway case defrosting moisture-proof device and relates to a railway equipment protection device. The railway case defrosting moisture-proof device comprises a bracket, a water-separating filter, a case, a draught fan, a generator and fan blades, wherein the fan blades are in driving connection with the draught fan and the generator. The water-separating filter is in communication with the draught fan through an exhaust pipe. The draught fan is in communication with the case through a cut-off return valve. A humidity detecting switch, a pressure detecting switch anda sewage drain valve are disposed in the case. The bracket is further provided with a photovoltaic panel and a battery box. The railway case defrosting moisture-proof device separates the air from the moisture in the atmospheric air, and supplies the clean air to the railway case in order that the air pressure in the box reaches a constant-pressure state, thereby realizing a purpose of resistingthe pressure by the pressu