Pneumatic solid particle feeding system

The invention relates to a pneumatic solid particle feeding system which comprises a main blowing pipe, a feeding pipe and a hopper. The feeding pipe is used for conveying solid particles from the hopper, and the main blowing pipe is used for providing conveying air for conveying the solid particles for the feeding pipe. The pneumatic solid particle feeding system is characterized in that an end notch of an air outlet of the main blowing pipe is flush with the side, close to the end of the feeding pipe, of a discharging opening of the hopper, and at least part of the end notch of the air outlet of the main blowing pipe inclines, so that the conveying air blown by the main blowing pipe has a vector in at least one other direction besides the horizontal direction. By means of the pneumatic solid particle feeding system, the shapes of solid materials can be kept good, and the pipeline blocking phenomenon is avoided. The pneumatic solid particle feeding system is directly connected with an inlet pipe of a device reactor through the feeding pipe in a sealed mode, and therefore the continuous material conveying process can be achieved, energy consumption is lowered, and environment pollution is avoided.