In order to understand the transport law of smoke after a fire in the belt lane of 1602 working face and the evacuation method of underground workers after a fire, a belt lane fire model was established and the changes of temperature and CO concentration in the belt lane during a fire were numerically simulated using Fluent fluid analysis software according to the actual situation in the underground of 1602 working face, and the evacuation of personnel was studied according to the obtained smoke transport law. The safety of evacuation was studied according to the smoke transport law. The results showed that the cooling and smoke evacuation effect of the tunnel was poor when the wind speed was 1 m/s, and the smoke evacuation effect was better when the wind speed reached 2 m/s. The cooling and smoke evacuation effect of the tunnel was further improved by the wind speed, and the personnel can be evacuated safely after the fire in the belt roadway.