Falia expression is a spoken language formulated in the linguistic and cultural facts supporting the community. This study aims to describe the falia expression of Muna society in Barangka district serves as a control to protect the forest, rivers, sea, flora, and fauna. The study used a qualitative approach with methods ecolinguistics. Source of research data is an oral speech in situations informant said that natural and candid as the primary data and research resources that have been published as secondary data. Time data collection was done in January 2019 until June 2019 in the region Barangka district. Data collection is conducted with involved participation techniques, observations, and interviews. Analysesare carried out during collection, reduction, presentation, and conclusions/verification. Data analysis is inductive-qualitative. The results showed that the role falia as of protecting the environment in Barangka district classified into five categories: First, falia as the protection control of forest; Second, falia as the protection control of river; Third, falia as the protection control of sea; Fourth, falia as the protection control of flora; Fifth, falia as the protection control of fauna. In general, falia expression classified in the imperative statements, either command or forbidden.