Blockage clearing system and method suitable for dry dedusting pneumatic transmission

The embodiment of the invention provides a blockage clearing system and method suitable for dry dedusting pneumatic transmission, and relates to the field of iron and steel smelting. The problem that blockage is prone to occurring in the dry dedusting pneumatic transmission process is solved. The unblocking system suitable for dry dedusting pneumatic transmission comprises a transmission pipeline and a screw rod piece, and the screw rod piece is rotationally arranged on an unblocking hole in a sealed mode; the screw part is provided with a channel, and one end of the channel is used for communicating with a transmission pipeline; the screw part is provided with a plurality of exhaust holes which are distributed at intervals in the axial direction and communicate with the channel, and the exhaust holes are used for being exposed out of the unblocking hole or returning back into the conveying pipeline in the process that the screw part rotates relative to the unblocking hole. The unblocking method suitable for