The case of monopoly imposed by the Shenzhen Association in 2021 has once again triggered a discussion on the issue of anti-monopoly compliance by trade associations. As representatives of the interests of the industry and the common interests of its members，trade associations have a natural tendency and inherent urge to commit acts that restrict competition. In recent years，while civil antitrust litigation has been increasing，trade associations have also become the focus of attention of antitrust enforcement agencies. This report analyzes the causes of monopoly in trade associations，and discusses the anti-monopoly compliance of trade associations from two different perspectives：government supervision and trade associations，and proposes that the anti-monopoly compliance of trade associations should move from passive response to active action，and achieve the dual balance of “stopping monopoly” and “preventing monopoly”. The report proposes that the construction of anti-monopoly compliance by industry associations should move from passive response to proactive action，and achieve a dualistic balance between “stopping monopoly” and “preventing monopoly”.