The invention discloses a drying method of liquorice leaves. The drying method comprises the following steps of putting the cleaned liquorice leaves to be dried into an upper material collecting groove positioned above material turning plates; a scraping plate positioned above the material turning plates is pulled to move along the length direction of a spreading support frame; the liquorice leaves are flat paved or shoved, pushed and turned; through the movement of a driving chain, the synchronous turning of the material turning plates is driven, so that the liquorice leaves are subjected to perturbation; the air convection is increased; in the drying process, water on the surface of the liquorice leaves falls into a material discharging groove through gaps formed between the material turning plates; due to the increase of the gap between the material turning plates in the turning process, partial liquorice leaves slide down into the material discharging groove; a bottom plate of the spreading support frame is a filtering screen layer, so that the partial sliding and falling liquorice leaves are separated from water through the filtering screen layer.