The invention discloses a high-temperature fire extinguishing device for a
belt conveyor roller and a fire extinguishing method of the high-temperature fire extinguishing device. The
belt conveyor comprises a
workbench, the fire extinguishing device comprises a fixing frame, a fire extinguishing device body, a fire extinguishing device body and a fire extinguishing device body, the fixing frame is externally arranged on the
workbench, and a fixing plate is arranged on the fixing frame and located above the
workbench; the spraying cooling
assembly is arranged outside the workbench and comprises a double-end
pipe, the double-end
pipe is arranged on the fixing plate, an outlet of the double-end
pipe penetrates through the fixing plate and faces the workbench, one end of the double-end pipe is connected with a first
branch pipe, the end, away from the double-end pipe, of the first
branch pipe is connected with a main conveying pipe, and the main conveying pipe is further connected with a second
branch pipe. A first spray head is arranged on one side, facing the workbench, of the double-head pipe; the temperature measuring
assembly is arranged on the side face of the workbench. The fire extinguishing device can carry out cooling and fire extinguishing treatment on the conveying belt and the outer side of the
belt conveyor, the cooling and fire extinguishing efficiency is improved, and then the belt conveyor can rapidly enter the working state again.