Abstract:China’s coastal islands and reefs are widely distributed, primitive island hills are bound to have high and steep rocky slopes during construction. From the perspective of eco-environmental protection, the re-greening and management of high and steep rocky slopes on island reefs is necessary. The island environment is special, with frequent typhoons and heavy rains, accompanied by high sunshine hours and high transpiration environmental conditions all year round. In this paper, the re-greening project of a high and steep rocky slope on a sea island in South Zhejiang is taken as an example. Proposing site-specific re-greening engineering practices for high and steep rocky slopes in marine areas. The measure of square wooden bars & anti-slip nutrient bars & retaining wings is used to solve the problem of substrate scouring under strong rainfall weather; combine the nine selection principles to determine the re-greening plant species; introduction of intelligent automatic sprinkler irrigation system to irrigate slope vegetation. It not only improves the efficiency of sprinkler irrigation and solves the problem of high environmental evapotranspiration, but also avoids the traditional manual sprinkler irrigation operation which is highly dangerous on high and steep slopes. The island''s high and steep rocky slope re-greening management project innovatively introduces an intelligent sprinkler irrigation system. Propose effective and efficient re-greening and management programs in conjunction with the actual works, this re-greening management practice has some engineering reference significance.