With the rapid development of the e-commerce industry, the monopoly behavior that may be involved in the development process has also aroused the attention of the academic community and judicial practice, especially the behavior of forcing merchants to “choose one of two” that is often staged by the e-commerce platform before the annual promotion activities has triggered hot discussion. In 2018, the “E-commerce Law” was officially introduced, which put the shackles on the behavior of e-commerce platforms forcing merchants to “choose one of two”. But in this context, it is still necessary to analyze the nature of the behavior and put forward the corresponding regulation path. On the basis of reviewing the existing literature, this paper summarizes and analyzes the forced “two-choice” behavior of e-commerce platforms, and summarizes the regulatory path proposed based on nature analysis, in order to provide better reference for regulating the operation of e-commerce platforms. This paper is divided into five parts, including the concept and classification of e-commerce platform forcing merchants to “choose one” behavior, research status, qualitative and regulatory necessity, nature analysis, and regulatory path.