Study on fresh agricultural products quality and safety under the perspective of supply chain

From the perspective of supply chain，using system dynamics simulation software Vensim，the quality and safety system dynamics model of fresh agricultural products was established to quantify the supervision policy of Hebei on vegetables. The results showed that compared with circulation supervision investments，production supervision investments were more effective to improve the level of fresh agricultural products quality. The effect of food safety training in production and marketing was not significant. And Biotechnological investments were more stable than supervision investments.