Abstract: Many chemical enterprises are distributed in the industrial parks of Yibin section of the Yangtze River, which have potential risks to the ecological environment of the surrounding basin. There is still a lack of corresponding technical guidelines and normative references for regional environmental risk assessment such as industrial parks. Using analytic hierarchy process (AHP), the environmental risk assessment of six industrial parks (A-F) in Yibin was carried out. Three criteria layers, namely, environmental risk sources, control measures and risk receptors, and 13 index layers were selected to establish the evaluation model. The 13 index layers included industry type, production process of enterprises in the park, environmental management system, environmental risk management system and receiving water environment, etc. The results showed that the total weight proportion of the criterion layer of the six industrial parks was environmental risk source (69.939) > environmental risk receptor (38.076) > risk control mechanism (33.420). The total environmental risk values of the parks were in the order of Park B (19.147) < Park D (19.265) < Park A (22.237) < Park C (23.646) < Park F (25.838) < Park E (30.321), all belonging to medium environmental risk.