Blockchain technology is widely adopted in the e-commerce supply chain due to its excellent anti-counterfeiting and traceability capabilities. However， changes in platform models and market dominance will significantly affect how e-commerce enterprises adopt blockchain technology. Focusing on reselling and agency platform modes， this paper studies the optimal pricing and upstream-downstream blockchain data collection node deployment strategies in the e-commerce supply chain under manufacturer-dominated and platform-dominated scenarios based on game theory. The results show that manufacturers and e-commerce platforms can obtain more profits when they hold market dominance under the resale platform model and do not hold market dominance under the agency platform model. Under both manufacturer-dominated and platform-dominated scenarios， the agency platform model is more beneficial to manufacturers. In the manufacturer-dominated scenario， when the platform commission rate is low， the reselling platform model is more favorable to the e-commerce platform； when the commission rate is high， the agency platform model is more beneficial to the e-commerce platform. In the platform-dominated scenario， the reselling platform model is more favorable to the e-commerce platform. Manufacturers tend to choose the combination of the agency platform model and the platform-dominated scenario， while e-commerce platforms tend to select the combination of the reselling platform model and the platform-dominated scenario. Therefore， in the context of blockchain technology adoption， e-commerce enterprises should fully consider the impact of different platform models when deciding whether to strive for market dominance， and the influence of different market dominance when choosing platform models； they should adequately consider the interactive impact of platform models and market dominance structures when investing in blockchain technology.