The present invention provides a structural element, a manufacturing method thereof, a steam scatter, a method and a sleeve thereof. The structural element is composed of fiber structural elements andparticles. At least partial particles exist with a form of an aggregate which adheres to the fiber structural elements. The structural element can quickly and stably absorb liquid and evaporate the liquid. The structural element can be used as a liquid absorbing core of a steam scatter such as a liquid absorbing type hot steam scattering desinsection device.