The BB fertilizer mixer (mixed fertilizer production line) adopts positive and negative rotation, and the material is mixed and output through the special internal screw mechanism and the unique three-dimensional structure. The equipment is novel in design and strong in practicability. Uniformity, electric control system, manual, automatic and composite settings are all features that other similar products do not have. The equipment has the characteristics of low price, small footprint, large output, and even mixing. The complete set of BB fertilizer equipment is mainly composed of the following equipment: storage silo; feeder; weighing scale; mixer; The process is as follows: storage system→feeding system→metering system→conveying and lifting system→stirring and mixing-→automatic packaging and sewing→finished product belt transportation-→computer control system. BB fertilizer equipment has a variety of specifications, and the output per hour is 7-9T, 10-14T, 15-18T, 20-24T, 25-30T, etc.; according to the mixed materials, there are 2 to 8 kinds of materials.