The invention provides pneumatic drill pore-forming and drilling dedusting equipment, which solves the problem that the conventional dust collection device is poor in airtightness effect, and includes a dust remover and a dust collector, wherein a streamline tee joint is arranged on the dust remover; the dust collector is connected with the tail of the streamline tee joint; a dynamic seal device and a static seal device are arranged in the dust remover; the dynamic seal device includes two layers of movable separation blades arranged on a drill rod in a sleeving manner; the movable separation blades are circular ring pieces with the pore diameter larger than the diameter of the drill rod; and the static seal device is arranged at the tail of the dust remover and can absorb dust. The equipment adopts the streamline tee joint to guide dust to enter a slag-dust separator; a slag-dust guiding port adopts a streamline baffle to guide slag and dust to enter the slag-dust separator with air flow, and has better guiding effect; and the sealing manner that the dynamic seal and static seal are combined, so that the sealing effect is better.