▎ 摘　　要

NOVELTY - The invention claims a device for filling air purifying agent, comprising a filling barrel, a conveying belt and a negative pressure box; the front end of the negative pressure box is provided with an inlet; the rear end is provided with an outlet; the inlet and the outlet are provided with a door curtain; one part of the conveying belt passes through the inlet and outlet so as to convey the material barrel to and out of the negative pressure box; the top part of the negative pressure box is provided with a through hole for sealing and extending the discharging port of the filling barrel; the inner part of the negative pressure box is provided with an annular passage; the inner ring part of the annular channel is provided with multiple air inlets; the outer ring part is provided with multiple air outlets; the top part of the negative pressure box is provided with an air pump; the air inlet of the air pump is connected with the air outlet of the annular channel. The invention uses the negative pressure box to realize the recovery of the dust when filling, so as to avoid the graphene powder leaking outwards from the barrel opening, improving the dust-proof effect.