The invention discloses an unblocking device for a cylindrical flat-bottom-shaped reinforced concretebunker and belongs to an auxiliary device for mineral separation. The unblocking device is characterized by comprising an air compressor, manual ball valves I, II and III, air storage tanks I and II, manual ball valves, left and right distribution boxes, an electric control cabinet, a pneumaticflow-assisting device and a pneumatic control device, wherein an auxiliary bunker is mounted at the flat bottom of the bunker; discharging hoppers are mounted on the bottom surface of the flat bottom of the bunker; the pneumatic control device mainly comprises a master control pipeline, an FRL combination (namely, the combination of an air filter, a pressure reducing valve and an atomized lubricator), a two-position two-waysolenoid valve, a pressure gauge II, acircular control pipeline, main control pipelines I and II, a branch control pipeline and pneumaticactuators I; the pneumaticflow-assisting device mainly comprises a master flow-assistingpipeline, a non-return valve, a pneumatic ball valve, a pneumaticactuator II, a pressure gauge I, a circular flow-assisting pipeline, main flow-assisting pipelines I and II, branch flow-assisting pipelines I and II, arc-shaped flow-assisting pipelines, semi-circular flow-assisting pipelines, pneumaticbutterfly valves and flow-assisting nozzles I and II; thus, the efficiency and the quality of mineral separation production are improved.