Linear array type combustible detector

The utility model provides a linear array type combustible detector, comprising a bar-shaped fixing housing, the inner of which is provided with a circuit board; a plurality of combustible gas sensors are linearly and uniformly arranged on the circuit board; two ends of the fixing housing are respectively in connection with a connection end cover; chambers of the connection end covers are provided with binding posts; the binding posts are in electric connection with the circuit board through leads. In use, the fixing housing can be conveniently fixed under a passenger seat in a bus or at a place in the bus close to the ground so as to perform detection rapidly; the plurality of combustible gas sensors are arranged in the fixing housing, so that a high density combustible gas sensor array can be formed by employing a relatively smaller number of detectors; accordingly, the linear array type combustible detector can detect deliberately dumped or inadvertently released dangerous flammable substances with a higher speed, timely send data to a master control device for alarming, and gain time for a driver to stop a bus and open the door, thereby effectively avoiding damage to passengers caused by artificial or accidental fires.