Protecting structure for big-gradient stone slope

The invention discloses a protecting structure for a big-gradient stone slope. According to the protecting structure, plant-growing plates and frames can be well assembled in advance by means of the modularized design of the protecting structure; in the field installation process, the installation process can be simplified and the installation difficulty can be reduced just by fixing protecting structure modules on the slope through anchor fixing holes; the plant-growing plates are designed to be V-shaped, so that rainwater can be conveniently gathered into the bottom of the V-shaped structure of each plant-growing plate and then flows to water collecting boxes to be stored. In less rainfall seasons, a valve is opened, and plants positioned below can be subjected to drip irrigation through drip irrigation pipes.