The “high consumption-low production and high import” model posed a serious challenge to the security of Chinese soybean supply chain. This article summarized the safety risk factors in soybean supply chain production, trade, circulation and other links, adds policy regulation factors, established a causal relationship diagram, constructed a system dynamic model, and evaluated the safety of soybean supply chain. Designed 6 different policy intervention plans for simulation analysis, analyzed the impact of different policy intervention plans on soybean supply chain security, and proposed countermeasures and suggestions.