The invention discloses an all-terrain fire fighting robot, including all-terrain mobile platforms, fire water cannon system, perceptual interaction system, electric control system, all-terrain mobileplatform is the mobile carrier of robot, all-terrain mobile platform is crawler structure, The utility model is composed of a shell, a suspension damping assembly, a track, a traveling gear train, achain tensioning assembly, a driving assembly, a track tensioning assembly, a fire water gun system, a sensing interaction system and an electronic control system, all of which are installed on an all-terrain mobile platform, and the electronic control system is connected with the all-terrain mobile platform, the fire water gun system and the sensing interaction system. The invention not only guarantees the sealing property of the robot, improves the waterproof and explosion-proof grade of the robot, but also improves the tensioning adjustment efficiency of the chain transmission system and the crawler traveling system of the robot, and improves the obstacle-crossing performance of the robot. The intelligent perception behavior of robot to obstacles can be realized, and the interaction ability between robot and environment can also be improved.