Curtain-type insulated thermal aerosol automatic fire-extinguishing system and mounting method and fire-extinguishing method thereof in cable groove

The invention relates to a curtain-type insulated thermal aerosol automatic fire-extinguishing system and a mounting method and fire-extinguishing method thereof in a cable groove. Existing thermal aerosol is not suitable for being used in the long cable groove, thus the curtain-type insulated thermal aerosol automatic fire-extinguishing system comprises a plurality of thermal aerosol automatic fire-extinguishing devices; each thermal aerosol automatic fire-extinguishing device is provided with two fireproof curtains; each fireproof curtain is provided with a control rope; reels are arranged at the lower edges of the fireproof curtains, and the fireproof curtains are wound around the reels; the control ropes comprise branch ropes and main ropes; the other ends of the main ropes are tied tothe middles of the branch ropes and pull the branch ropes into V-shaped ropes; the V-shaped ropes support fireproof curtain main bodies wound around the reels; the melting point of thermal collosol is lower than the temperat