Abstract: The scleractinian corals in Weizhou Island，Guangxi province, are mostly located in the northernmost edge of global coral reef distribution, which has significant ecological and scientific values. However, coral reefs in Weizhou Island have declined yearly in recent 30 years and they are facing with the threat of biodiversity declination and malfunction island ecosystem, the feasibility assessment and restoration strategy were discussed according to the decision-making process. The results showed that there were 21 species of scleractinian corals belonging to 10 genera and 5 families. All six indicators of seawater quality fell into the class I by the water quality standard of China. The interannual variation of marine eutrophication index showed it was in the oligotrophic status. The coverage rate of macroalgae was less than 1.00%, and more than 90.00% of coral reef fish were omnivorous. The fish population structure was suitable for the diversity of macroalgae, which is proper for scleractinian corals growth. However, the average coverage rate of the scleractinian corals in this area was only 5.60%. It showed that 57.27% of the submarine bed covered with reef, 34.30% with unstable gravel and sand, and the regeneration of coral larvae was very slow with an average of 3.17 ind/m². The results indicate that Weizhou Island has a good potential for coral reef restoration, but the low coral coverage and low coral juvenile recruitment and unstable sediment structure are the main factors that limit the natural restoration. To establish the coral reef ecological restoration technology, a system of “juvenile coral breeding coral cultivation in situ artificial coral reef three-dimensional habitat construction” shall be established, That is on the premise of reducing the interference of human activities, the main artificial restoration strategies for the coral reef decline area in Weizhou Island should be to cultivate coral seedlings timely, plant batch coral in situ and build three-dimensional habitat landscape of artificial coral reefs.