Drying method for lignite

The invention discloses a drying method for lignite. The drying method includes the steps that wetting fluid is added to the pulverized lignite, and wetting is carried out at a normal temperature; wetted materials are placed in a steam explosion tank, steam explosion media are introduced, and steam explosion treatment is carried out after a preset temperature is reached; then pressure relief is carried out rapidly, the treated materials in the steam explosion tank are discharged, and the materials subjected to steam explosion pretreatment are obtained; and the materials subjected to steam explosion pretreatment are dried. By the adoption of the steam explosion technology, internal water of the lignite is converted into external water, then the lignite is dried, and therefore the drying efficiency is greatly improved.