The invention provides a mattress. Fiber raw materials are adopted as materials, a designed forming device is used for implementing a designed manufacturing method, and the mattress is directly formed through the hot-press forming technology. The mattress is characterized in that the finished mattress is provided with multiple directly-through elastic barrels in the transverse direction, the elastic barrels are formed by being transversely disengaged from multiple barrel molds in the manufacturing process, reinforcing parts are arranged on the upper portions and the lower portions of the elastic barrels, and a better supporting effect can be achieved for people who lie down.