Hydraulic seeding is an affordable, widely applicable and efficient mechanized technique to establish an extensively and actively growing vegetation cover for slope stabilization. A dug typical slope of the key water control project at Feilai gorge in Guangdong province was selected as the test plot to study the application of hydraulic seeding technique for slope stabilization. The result shows that the speed for the seeded lawn to cover the slope surface effectively depends mainly on the ecological characters of the main species, the environmental condition for the seed germination and growth, and some other factors. These factors are closely related to the seed categories, the plant growing help chemicals, soil states, climatic conditions etc.