The invention relates to the technical field of fire ventilation and smoke exhaust, and discloses a method for ventilation and smoke exhaust in an underground station train fire. The method is used for controlling smoke exhaust channels arranged on different positions of an underground station; the method comprises the following steps that when the fire occurs on a train parking on an undergroundstation, an air valve on an air inlet of a smoke exhaust pipeline nearest the fire occurrence position and a tunnel draught fan corresponding to the smoke exhaust pipeline nearest the fire occurrenceposition are turned on; tunnel draught fans corresponding to all other smoke exhaust pipelines in the same group as the smoke exhaust pipeline nearest the fire occurrence position are turned on; air valves in air inlets of other all smoke exhaust pipelines in the same group are turned off to make smoke enter through the air inlet of the smoke exhaust pipeline nearest the fire occurrence position and discharged from other all smoke exhaust pipelines in the same group. Through the above method, the method for ventilation and smoke exhaust in the underground station train fire has the advantagesthat the smoke near the fire occurrence position can be effectively discharged in time, the spread of the fire behavior and smoke is slowed down, and favorable conditions are provided for rescue and fire extinguishing.