The invention discloses a method for directly obtaining a solid plant extract. The method comprises the following steps: (1) dehydration in advance; (2) microbulking; (3) crystal growth; and (4) separation: brushing a solid containing plant active components from the surface of a plant raw material which is subjected to crystal growth in the step (3) by virtue of a roller hairbrush machine. The appearance of the plant raw material is complete and further has utilization values.