The utility model discloses a dustproof device for bridge demolition, which relates to the technical field of
bridge engineering and comprises a gun
fog machine main body, a moving mechanism for moving is arranged at the bottom of the gun
fog machine main body, and a connecting
pipe is fixedly connected to a fan opening end of the gun
fog machine main body. An air inlet box is fixedly connected to the end, away from a fan opening of the gun and
fog machine body, of the connecting
pipe in a penetrating mode, a T-shaped cover plate is arranged on the top of the air inlet box, an air inlet groove is formed in the side, away from the connecting
pipe, of the air inlet box, and a connecting plate is fixedly connected to the inner wall of the air inlet box. The fan has the advantages that sand grains and fine stone grains splashed into the fan are difficult to block by the mounted protective net, elements and fan blades in the fan can be damaged when the impurities enter the fan, accordingly, the
failure probability of the fan is increased, and the problem that water mist cannot be sprayed when the fan fails, so that the service life of the fan is prolonged is solved. Therefore, the water mist flows back, and the fan is damaged.