Mute flat car with adjustable loading area

The utility model relates to the technical field of flat cars, and discloses a mute flat car capable of adjusting loading area, which comprises a loading plate, a component convenient to store is arranged in the loading plate, and a support component is fixedly connected outside the component convenient to store. The loading area of the flat car can be adjusted, by arranging the protection assembly, the situation that goods incline and fall in the goods transferring process can be avoided, so that the protection effect is achieved, after the flat car is used, the extension plate can be rotated towards the direction of the pushing handle through the rotating rod, the extension plate is rotated into the containing groove, and at the moment, the loading area of the flat car can be adjusted. The first magnet and the second magnet attract each other, and the suction cups attract the interior of the storage groove, so that the extension plate can be fixed in the storage groove, the situation that the occupied area