This article aims to initiate a discussion about the challenges of applying Thailandûs Trade Competition Act, B.E. 2560 (2017) to digital platform businesses. It begins by exploring the idiosyncratic characteristics of digital platforms and the ways in which these create new problems for competition. It then surveys regulatory proposals and academic discussions on the optimal legal solutions to competition issues involving digital platforms while noting that such debates have remain unresolved after decades, even in jurisdictions with well-established antitrust/competition laws. The article questions whether the existing provisions of the Trade Competition Act B.E. 2560 (2017) can effectively address emerging legal concerns arising out of the operation of digital platform businesses in Thailand. Drawing on literature from other jurisdictions, it is argued that it may be necessary to amend the Act and subordinate legislations adopted under the Act in some respects, notwithstanding the fact that the Act provides sufficient room for manoeuvre in terms of interpretation and application to address a number of emerging concerns in the digital platform businesses. The paper concludes that the most important step is to improve the understanding of markets of the digital platforms and reformulate certain critical criteria under Thailandûs competition law in response to the dynamic of the digital platform businesses.