This invention provides a mixing device for a powdered bactericide, including a storage box with partitions fixed at equal intervals inside. Semi-circular
discharge ports are evenly spaced at the bottom of the storage box, each with a rotating mixing tube. Mixing box connecting rods are fixedly installed on both sides of the storage box, and a mixing box is fixedly connected between these connecting rods. A lifting
pipe hole is opened at the upper part of the mixing box, corresponding to the rotating mixing tube. A lifting
pipe is slidably connected to the lifting
pipe hole and inserted into the rotating mixing tube. This invention achieves quantitative feeding and mixing of raw materials by arranging multiple sets of storage boxes parallel to each other on the upper part of a mixing device and by providing a rotating
feed tank structure between the storage box and the mixing device. By extending and retracting the
feed tank structure to change its volume, raw materials from the storage box are fed into the
feed tank structure through the rotating structure until it is full.