China became a member of the World Trade Organisation (WTO) in December 2001. This historical event has impact on both China and the WTO. As an observer noted, ‘The WTO will change China, but China will also change the WTO’. This thesis is an example how the WTO will change China. It examines the WTO’s impact on the formulation of China’s first comprehensive competition law, the Antimonopoly Law of the People’s Republic of China (hereinafter the Antimonopoly Law 2007). The formulation of the Antimonopoly Law 2007 has generated unprecedented interest within and outside China due to the sheer size of the Chinese economy and trade. Despite this significance, there is a lack of studies on the WTO’s impact on the formulation of the Antimonopoly Law 2007. Against this background, this study examines whether, and if so, how the WTO could have had impact on its formulation, and to what extent the formulation of the Antimonopoly Law 2007 has reflected such impacts.