Pneumatic sample feeding box with buffering function

The utility model relates to the technical field of sample conveying, and discloses a pneumatic sample conveying box with a buffering function, which comprises a box body with a cylindrical structure, the two ends of the box body are open, the top and the bottom of the box body are respectively provided with a box cover and a plug which have the same structure, and the plug is fixedly connected with the bottom of the box body. A threaded butt joint assembly is installed between the box cover and the box body, the box cover and the plug are both sleeved with rubber heads of an annular structure, the two rubber heads are connected with the box cover and the plug through bolts respectively, a matched buffer spring is arranged in the box body, and the bottom of the buffer spring is fixedly connected with the upper surface of the plug. And an annular rubber pad matched with the inner cavity of the box body is fixedly mounted at the top of the buffer spring. According to the sample feeding box, objects with the vol