The "choose one from two" action of e-commerce platforms has recently attracted the attention of anti-monopoly law enforcement and judicial authorities.The theory of abuse of a superior bargaining position has also been applied to the processing of related cases.Due to the current dynamics of China's e-commerce market, low consumer stickiness, gradual reduction of merchant transfer costs, and strong platform pressure resistance, the core "vertical dependence" of the theory of abuse of a superior bargaining position is poorly operable.Although this theory can solve the unfairness between strong e-commerce platforms and weak merchants, since the "choose one from two" action also has positive effects such as stimulating platform competition, its application may violate the neutral concept of competition, excessive intervention in the market, and alienation the Anti-Monopoly Law.When defining the relevant market, we must pay attention to the payment market where the merchant is located, exclude the traditional market and clearly distinguish the different types of e-commerce platforms.When we determine the dominant position of the e-commerce platform market, the merchant side should be included in the market share, and the time of identifying the trading volume market share should be appropriately extended.It also attaches importance to the platform ecology and data on the dominant position of the market, and market barriers such as transfer costs, consumer preferences.Using the principle of reasonableness to determine whether the action is illegal, only when the negative effect of action restricting competition is significantly greater than the positive effects, such as platform operation efficiency and consumer welfare improvement, the action could be deemed as violating the anti-monopoly law.