Abstract: In order to effectively curb the occurrence of construction safety accidents in expressway PPP construction projects, and to improve construction safety and quality in an all-round way, it is necessary to actively explore a dual prevention mechanism safety prevention and control system based on the actual situation of the project. Based on a comprehensive understanding of the current status of the safety prevention and control system of the dual prevention mechanism of PPP construction projects in expressways, this article puts forward several suggestions in order to further optimize the advantages of the dual prevention mechanism of expressway projects.