In order to analyze the role of the third-party logistics in the supply chain transformation, this paper combines the research report of the third-party logistics in the United States in 2017. Third-party logistics can participate in supply chain transformation decision consultation, and assist in the establishment of supply chain transformation plans, evaluation and analysis of key performance indicators during the transition process, and continuous improvement. The article introduced the related theory of supply chain transformation and elaborated the steps of the supply chain transformation. Based on the third-party logistics research report of the United States, the third-party logistics has been analyzed in the supply chain transformation. Finally, we will sort out the role of third-party logistics in the supply chain transformation, including real-time analysis, profitability analysis of trade lines, collaborative strategy, continuous relationship management, security, user-based content management, and quantifying the profitability of customers and projects.