This research aims to find out how the AFTA-CHINA Cooperation Agreement is to Realize a Free Trade Area between ASEAN Countries and China. The research method used is normative legal research, namely looking at the norms and rules that apply in the multilateral trading system which are beneficial for developing countries. As for the conclusion of this description, namely the Legal Study Regarding ACFTA. protect domestic industry (local products in the country itself) and the policy must be in accordance with the principles of transparency, honesty and stipulated in one rule, namely law. International competition, including the AFTA-China regional trade trend, is fine, and this trend must be used as a business opportunity to improve the Indonesian economy, especially North Sumatra, so the Indonesian government should provide policies in accordance with the principles of justice for the public interest, then for business actors. (economic activity actors) should also not act fraudulently in trading and continue to comply with regulations in accordance with applicable regulations.