Usage method of automatic flood control device for highway tunnel building

The invention provides a usage method of an automatic flood control device for the highway tunnel building. The automatic flood control device for the highway tunnel building comprises an automatic blocking device, and the automatic blocking device comprises a flood tank, a flood tank water groove, a driving arm, a hinge seat, a driven arm, an elastic blocking tire and a blocking tire guide groove. The flood tank water groove, the blocking tire guide groove and a flood inlet of the highway tunnel are formed by concrete buildings; when the highway tunnel is immersed by flood, the flood enters the flood tank from the flood inlet, the flood is utilized to drive the flood tank to swing, the flood tank drives the elastic blocking tire to swing and rise to the road surface before entering the tunnel through the driving arm, the hinge seat and the driven arm, motor vehicles are prevented from entering the tunnel immersed by the flood. The problem that the motor vehicles enter the tunnel immersed by the flood is solved. The life and property of people and the safety of subway facilities are maintained; After the flood falls off, the elastic blocking tire automatically swings, descends and resets, and the normal traffic is recovered.