The invention discloses a rock-desertification ecological restoration method. The method includes the following steps of 1, rock-desertification matrix collating, 2, microalga inoculating, 3, herbaceous plant planting, 4, maintenance managing, and 5, bush and arbor planting. Rock-desertification matrix collating includes the steps of 1, collating terrain, and 2, replacing local soil with soil removed from other places. Terrain collating includes the steps of 1, removing pumice stones and dangerous rock bodies, 2, leveling slashes, and 3, protecting side slopes. Microalga inoculating includes the steps of 1, selecting algae species, 2, cultivating the algae species, 3, preparing algae powder and 4, conducting manual rock-desertification inoculation on microalgae. Herbaceous plant planting includes the steps of 1, grass seed selecting, 2, ground treating, 3, fertilizer applying, 4, seed sowing, and 5, soil covering. Bush and arbor planting includes the steps of 1, tree seed configuring, and 2, seed sowing. The rock-desertification ecological restoration method integrates a microalga biotechnology, an ecological soil restoration technology and an ecological forestry restoration technology, and a new technical method is provided for scientific and efficient rock-desertification treatment.