Mounting assembly of vehicle-mounted fire extinguisher and automobile

The utility model provides a mounting assembly of a vehicle-mounted fire extinguisher. The mounting assembly comprises a first bracket and a second bracket fixedly connected between the first bracket and a seat metal plate of the automobile, wherein the second bracket comprises a first plate and a second plate, wherein the first plate and the second plate are located at two ends of the second bracket respectively and located on the same plane, the second bracket is fixedly connected with the seat metal plate through the first plate and the second plate, one end, close to the second plate, of the first plate extends to the front end of an automobile body to form a third plate, one end, close to the third plate, of the second plate extends to the front end of the automobile body to form a fourth plate, and a mounting plate is connected between the third plate and the fourth plate and fixedly connected with the first bracket through a connecting part. With adoption of the technical scheme, operation of a driver to the fire extinguisher is facilitated. The utility model further discloses an automobile provided with the mounting assembly.