The present invention provides a solid beverage containing barley leaves, comprising the following components: 15-60 wt.% of a barley leaf micro-powder, 10-50 wt.% of xylitol granules, 5-20 wt.% of a matcha powder, 1-10 wt.% of inulin, 0.5-4.0 wt.% of a konjac powder, 0.2-3.0 wt.% of silicon dioxide, and 0.1-3.0 wt.% of sucralose. The present invention also relates to a method for preparing the solid beverage, comprising the following steps: mixing a barley leaf micro-powder, inulin, a konjac powder and matcha powder, and then performing wet granulation on same to obtain granulated powders; passing the granulated powders through a 20-mesh sieve after drying same to obtain whole granules; and uniformly mixing the whole granules with xylitol granules, sucralose and silicon dioxide, and then sub-packaging same, so as to obtain the solid beverage. The solid beverage is easy and fast to dissolve, does not separate, and tastes refined and smooth.