A garment fabric drying and dedusting device comprises a base plate, an air suction device, a heating device, a frame body device, a fan device, a support device, a motor device and a fixing device. The air suction device comprises a first air inlet hopper, a first filter hopper, a first pipeline, a first fan, a second pipeline, a first box, an air valve, a third pipeline and a first valve. The heating device comprises a heating frame, a triangular block, a first heat dissipation frame, a first heating rod, a fourth pipeline, a first support and a first cross rod. The frame body device comprises a frame body, a first vertical rod, a first roller, a second cross rod, a second roller, a third roller, a hook part and a bent plate. The fan device comprises a fifth pipeline, a second fan, a second box, a filter screen, a second heat dissipation frame, a second heating rod, a sixth pipeline and a second valve. The support device comprises a second support, a third cross rod, a third support, a first inclined rod, a fourth cross rod and a second vertical rod. The garment fabric drying and dedusting device can dedust and dry a garment fabric thoroughly.