Mixing material conveying device of pneumatic fertilization device

The invention relates to a fertilizing tool, in particular to a mixing material conveying device of a pneumatic fertilization device. The mixing material conveying device is composed of a material mixing body, a spraying pipe and a pneumatic sprayer. The material mixing body and the spraying pipe are connected into a whole. The material mixing body is arranged at the rear end of the spraying pipe. The pneumatic sprayer is arranged in the inner space of the material mixing body. A pneumatic channel is formed by the inner space of the pneumatic sprayer. The rear end of the pneumatic channel is connected with a compressed air input connector. A pneumatic nozzle is arranged at the front portion of the pneumatic sprayer. The inner space of the pneumatic nozzle is communicated to the pneumatic channel. The inner space of the rear portion of the spraying pipe is of a conical structure rapidly shrinking. The inner space of the front portion of the spraying pipe is of a conical structure gradually expanding. A jet orifice is formed between the rear portion and the front portion of the spraying pipe. A supercharging material conveying cavity is formed by the conical inner space of the front portion of the spraying pipe. A negative-pressure cavity is formed by the peripheral space of the pneumatic nozzle. Pneumatic fertilization is utilized, a mechanical action mechanism is not needed for the fertilization device, air and fertilizer are sufficiently mixed, fertilization is even, and the fertilization efficiency is high. The mixing material conveying device is suitable for spraying liquid fertilizer or pesticides and is also suitable for spraying solid particle fertilizer.