Double-layer bacterium adding device used for producing biological organic bacterial fertilizer

The utility model provides a technical scheme of a double-layer bacterium adding device used for producing biological organic bacterial fertilizer. According to the scheme, the double-layer bacterium adding device comprises a powder bacterium adding device, a liquid bacterium adding device and a bacterial material mixing device. Bacillus subtilis is stirred into a powder bacterium adding pipeline through the powder bacterium adding device, and the addition amount of the bacillus subtilis can be accurately controlled. Beneficial bacteria are sprayed into a roller through a liquid bacterium adding device. The bacillus subtilis, the beneficial bacteria and organic fertilizer are fully and evenly mixed in the bacterial material mixing device. The produced biological organic bacterial fertilizer is good in quality. The production efficiency is high.