How do platforms generate competitive advantage？ This question is important with the development of digital economy and the rapid emergence of platforms. However， scholars from the economics， technology management and strategic management conceptualize platform differently， which makes it difficult to explain the platform competitive advantage comprehensively. From the strategic management perspective， based on the strategic positioning view and resource-basedview， it integrated the economics and technology management research， and proposed the theoretical model of “strategic market environmen strategic position decision strategic resources construction strategic activity results”. The theoretical model shows that the generating of platform competitive advantage is to construct strategic resources based on strategic position in established strategic market environment. Platform strategic position is about the setting of platform value propositions such as scaled value or differentiated value， depending on the demand heterogeneity of platform market environment. Based on platform strategic position， the platform performs strategic resources construction activities such as architecture design and ecosystem governance to construct ecosystem strategic resources. Platform architecture design and ecosystem governance are interdependent， and the extent to which each follows the chosen strategic position determines the advantages of the platform strategic position. The conclusion helps to improve the systematic understanding of platform competitive advantage and promote platform competition research.