Tunnel fire monitoring and alarming device

The invention belongs to the technical field of computer heat dissipation, particularly relates to a tunnel fire monitoring and alarming device, and aims to solve the problems that an expressway tunnel serving as a special building is complicated in structure, closed in environment, large in traffic volume and dense in personnel along with the development of times, and escape and rescue work is very difficult once a fire occurs. By means of the horizontal measuring device, it is guaranteed that the bottom plate and the top face are in a horizontal state when fixedly connected, and installation inclination is avoided; by means of the limiting device, mounting and dismounting between the connecting block and the bottom plate are facilitated; the interior of the tunnel can be ventilated through the ventilation fan, and fire can be extinguished at the first time by controlling the water spraying head in case of a fire; and the structure is simple, automation degree is high, installation is convenient, and labor i