Microbial feed additive compounding device

The utility model discloses a microbial feed additive compounding device which comprises a compounding box, a fixing plate and a first filter screen are arranged in the compounding box, a through hole is formed in the fixing plate, the fixing plate is fixedly connected with the first filter screen, a conveying cavity is formed above the first filter screen, a conveying shaft is arranged in the conveying cavity, a conveying auger is arranged on the conveying shaft, and the conveying auger is arranged on the conveying shaft. A mixing cavity is arranged below the first filter screen, a feeding pipe is arranged on the mixing cavity, a quantitative feeding mechanism is arranged on the feeding pipe, a mixing assembly is arranged in the mixing cavity, a crushing cavity is arranged below the fixing plate, the crushing cavity is communicated with the mixing cavity through a material guide pipe, and a second filter screen is arranged in the material guide pipe. And a second filter screen with the same aperture as the f