Waste gas treatment device of flame cutting machine

The utility model discloses a flame cutting machine waste gas treatment device which comprises a collecting box, an air blower and a filter box are fixedly connected to the upper surface of the collecting box, mounting holes are formed in the lower surface of the filter box and the upper surface of the collecting box, hollow pipes are fixedly connected to the inner walls of the mounting holes, and scrapers are fixedly connected to the surfaces of the hollow pipes. According to the waste gas treatment device of the flame cutting machine, the first control valve is opened, the second control valve is closed, the air blower is started, the dust hood sucks waste gas generated during cutting into the filter hood, the filter hood filters dust in the waste gas and discharges the dust through the air blower, and when the dust in the filter hood is too much, the first control valve is closed, the second control valve is opened, and the motor is started; the motor drives the gear to rotate through the driving wheel, so