Cold channel fire extinguishing system for computer data room

The invention discloses a cold channel fire fighting system for a computer data room, relates to the field of machine room cold channel fire fighting, and solves the problem that when an existing cold channel fire fighting system for the computer data room is used, natural ventilation is performed only through an opening when a skylight is opened, so that the ventilation efficiency is low, and the fire fighting efficiency is influenced. Comprising a cold channel pipe, a skylight mechanism, a ventilation mechanism and a sealing mechanism, an air inlet pipe and an exhaust pipe are arranged in the cold channel pipe, a mounting frame is fixedly connected to the cold channel pipe, and the skylight mechanism is used for sealing the air inlet pipe and the exhaust pipe; the ventilation mechanism is used for driving the skylight mechanism to be opened when ventilation is needed, meanwhile, the ventilation mechanism is converted into a fan shape to rotate continuously to accelerate the air inlet efficiency of the air i