The international situation changed in 2018，the unilateralism pursued by the United States and the “China-US Trade War” provoked some serious impacts on global economic integration and trade order，and cast a shadow over the growth of the world economy. In the field of trade war，Brazil cannot be immune to it，and its economic and social impacts cannot be ignored. This article focuses on the social reforms and situation in Brazil in 2018，including pension reform，labor reform，education reform and domestic peace and order，and analyzes the challenges facing its future development on this basis.