Railway vehicle and ventilation and heat dissipation device thereof

The utility model discloses a rail vehicle and a ventilation and heat dissipation device thereof, and relates to the technical field of rail transit, the ventilation and heat dissipation device comprises a sealing box body and a fan module, the sealing box body is provided with a mounting cavity and a sealing and heat dissipation cavity, the sealing and heat dissipation cavity is arranged above the mounting cavity, the mounting cavity is used for mounting components and equipment to be subjected to heat dissipation, and the fan module is arranged above the sealing and heat dissipation cavity. The sealing box body is further provided with an air inlet and an air outlet, the air inlet and the air outlet are each provided with a filtering mechanism used for filtering high-humidity and dusty outside air, cold air outside the sealing box body enters the installation cavity through the air inlet and is exhausted out of the air outlet through the sealing heat dissipation cavity, and the fan module is installed in th