The invention discloses a plastic particle feeding device. The device comprises a material transporting mechanism and a material conveying mechanism, wherein the material transporting mechanism comprises a frame, a sliding rail arranged on the frame and a plurality of sliding mechanisms which are in sliding fit with the sliding rail, lifting hooks arranged below the sliding mechanisms and material boxes hung on the lifting hooks; the material conveying mechanism comprises a material catching module and a material absorbing machine which is connected with the material catching module; the material catching module is arranged below the material boxes; discharging holes are formed in the bottom of the material boxes; and the material catching module cooperates with the discharging holes. The plastic particle feeding device disclosed by the invention has the beneficial effects that plastic particles are transported by adopting independent material boxes and the plastic particles are prevented from being in contact with the outside world in the feeding process to ensure that the plastic particles are not polluted by the outside world, so that the product quality is increased.