Permafrost roadbed active cooling ventilation pipe

The invention discloses a permafrost roadbed active cooling ventilation pipe. The permafrost roadbed active cooling ventilation pipe comprises a ventilation pipe body buried below a permafrost roadbed, an air inflow pipe is arranged on one end opening of the ventilation pipe body, an electric air stopping device is arranged on a pipe opening of the air inflow pipe, a suction fan is arranged in theposition, below the electric air stopping device, in the air inflow pipe, the top end of a rotary shaft of the suction fan penetrates through the electric air stopping device and is arranged on the outer side of the air inflow pipe, and fan blades are fixed to the rotary shaft; an electric generator, a charging controller and a storage battery are arranged in the air inflow pipe, an input shaft of the electric generator is in transmission connection with the bottom end of the rotary shaft through a continuously variable transmission, and the electric generator, the charging controller and thestorage battery are elect