Sewage treatment agent mixing device

The utility model belongs to the field of sewage treatment, particularly relates to a sewage treatment agent mixing device, and provides the following scheme aiming at the problems of incapability of continuously adjusting and adding an agent, long stirring time and insufficient agent mixing in the prior art: the sewage treatment agent mixing device comprises a mixing box, two sides of the bottom of the mixing box are fixedly connected with supporting legs, and the supporting legs are fixedly connected with the bottom of the mixing box; a discharging opening is fixedly formed in the bottom of one side of the mixing box, a control valve is movably installed on the discharging opening, a first motor is fixedly installed on the top of the mixing box, a first bevel gear is fixedly connected to an output shaft of the first motor, a filling assembly is arranged on the first bevel gear, and a second motor is fixedly connected to the bottom of the mixing box; according to the medicine adding device, medicine can be c