The utility model relates to a blocking device, concretely relates to mine-used flameproof feed switch operating handle blocking device, technical problem for solving the easy maloperation that prior art exists provides a simple structure, uses safe and reliable's mine-used flameproof feed switch operating handle blocking device, and the technical scheme who adopts is provided with feed switch cashier's office in a shop for feed switch, and feed switch is provided with the switch protective housing cashier's office in a shop, is provided with the draw-in groove on the switch protective housing, and feed switch's concretely relates to 1 clamps in the draw-in groove, and feed switch's shaft is improved level and is provided with the shutting screw rod, is provided with the shutting nut on the shutting screw rod, and the screw rod that locks lies in the internal portion of protective housing, and the safeguard casing runs through from top to bottom and is provided with the lockpin, and the lockpin lies in and locks between screw rod and the feed switch cabinet, and the bottom of lockpin is provided with the lockhole, installs the safety lock in the lockhole, the utility model discloses extensively be used for feed switch's latch-up protection.