It’s a common strategy to deal with disruptions through emergency assistance between enterprises in supply chain emergency management，the goal of which is to prevent disruptions damage getting out of control． This paper introduces CVaR to depict the enterprise’s emergency goal under disruption，and then establishes the decision model of supply chain emergency assistance． We analyze the emergency assistance conditions of supplier and retailer under disruption，and provide the optimal assistance strategy under certain confidence control level． Research shows that the CVaR method can describe the assistance behavior of supply chain felicitously，and the assistance collaboration can maintain the supply chain operations continuity effectively．