Based on the natural conditions of the South China Sea and Hainan Province, considering the usage of the Island AWS equipment under high temperature, high humidity, high salt spray, strong radiation, gale and other harsh environment in South China Sea in recent years, the failure reasons of the island AWS through statistics and analysis of failures and failure modes on the island station for many years are discussed. According to the Island AWS construction and protection requirements and the experiences accumulated by the site meteorological equipment maintenance staff for many years, some effective protection methods and measures are proposed by using highquality materials, advanced technology, a variety mature and key electronic equipment protection technology on the market, to improve the marine environmental adaptability of the Island AWS equipment and extend equipment service life.