Method for preparing calcium sulfate whisker and calcium sulfate whisker

The invention provides a method for preparing calcium sulfate whiskers and the calcium sulfate whiskers, and the method comprises the following steps: crushing fiber gypsum into fiber gypsum blocks, putting the fiber gypsum blocks into an immersion liquid pool filled with water, heating the water to a first preset temperature, soaking for a first preset time, taking out the soaked fiber gypsum blocks, and putting the soaked fiber gypsum blocks into a net-shaped basket layer by layer, feeding into a steam-curing kettle, controlling the steam-curing kettle to respectively increase the temperature and the pressure in the kettle to a second preset temperature and a first preset pressure within a second preset time, keeping the temperature and the pressure of the steam-curing kettle for a third preset time, and then controlling the steam-curing kettle to respectively reduce the temperature and the pressure in the kettle to a third preset temperature and a second preset pressure within a fourth preset time; and tak