Preheating treatment device for plastic particles before injection molding

The preheating treatment device comprises a fixed base and a preheating mechanism, a box body is arranged on the upper end face of the fixed base, a feeding groove is formed in one side of the upper end face of the box body, a discharging port is formed in the lower end of one side of the box body, a screening mechanism is arranged in the box body, and a discharging port is formed in the other side of the box body. The preheating mechanism is arranged on the box body and comprises an air pump, an air guide pipe, a plurality of exhaust pipes, a plurality of spiral electric heating wires and a plurality of air outlet holes, and the air pump is arranged on one side of the upper end face of the box body; the plastic particle pre-heating device is simple in structure and reasonable in design, plastic particles are pre-heated, so that the plastic particles can be heated more uniformly, non-uniform heating caused by different specifications and sizes of the plastic particles during heating injection molding is preve