Abstract: Antarctica has always been one of Chile’s core national interests because of its relative geographic proximity and territorial claims to Antarctica which prompts Chile to play an important role in Antarctic affairs. Chile has always regarded Antarctic legislation as a significant means to safeguard its Antarctic rights and interests and respond to the changes of situation in different historical periods. It has established a developed and improved legal system which take “Antarctic territory” management as the basic framework and based on the adjustment of Antarctic policy objectives and development of the Antarctic Treaty System. The Law No. 21255 which has taken effect in 2021, is the typical representative of keeping pace with the times that has certain enlightenment significance for China’s Antarctic legislation.

Key words:  , Chile, Antarctic Treaty System, Antarctic governance, Antarctic legislation