Modern Economics & Management Forum

With the rapid development of the platform economy, the traditional related market definition methods are facing multiple challenges, including the diversity of subjects, free goods and multiple functions in the platform economy. To address these challenges, this paper proposes improvements, including the introduction of non-price factors for alternative analysis, comprehensive consideration of multi-agent relationships, and dynamic and flexible approaches to define relevant markets. These improvements will help to more accurately define the relevant markets under the platform economy and provide effective support for antitrust regulation. In the future, we should continue to explore innovative methods and technical means to adapt to the new changes and development trends of the platform economy.