Waste gas treatment device for environmental engineering

The utility model discloses a waste gas treatment device for environmental engineering, which comprises a waste gas treatment unit, the waste gas treatment unit comprises a purification box and a gas inlet pipe fixedly communicated with the purification box, the lower end of the gas inlet pipe is inserted into the lower part of an inner cavity of the purification box, one side of the purification box is fixedly communicated with an exhaust pipe, and the exhaust pipe is communicated with the upper part of the inner cavity of the purification box; the timing water supplementing unit comprises a gear motor fixedly installed on one side of the purifying box and a pinion fixedly arranged on the gear motor in a sleeving mode, one side of the purifying box is rotationally connected with a rotating rod, the rotating rod is fixedly sleeved with a large fluted disc meshed with the pinion, and a fixing plate is further fixedly installed on the side wall of the purifying box; a counting switch is fixedly installed on the