Quantitative dosing device for sewage treatment

The utility model belongs to the technical field of sewage treatment, and particularly relates to the field of quantitative dosing devices for sewage treatment, which comprises a base and a motor, a medicament barrel is mounted on the inner side of a fixed block, a filter box is mounted on the left side wall of the medicament barrel, an air filter element is arranged in the filter box, and a box cover is mounted above the filter box. A first water pump and a second water pump are installed on the front side and the rear side of the base correspondingly, electromagnetic valves are arranged at the ends, away from the agent barrel, of the first water pump and the second water pump, the motor is installed in the middle of the top plate, and a first gear is installed below the motor; a rotating shaft is installed at the axis position of the second gear, a stirring rod is installed on the outer side of the rotating shaft, a single chip microcomputer is installed on the right side of the supporting plate, gas genera