The unexpected events can lead to the random fluctuation of the market demand and price, and the information asymmetry of supply chain members as well. Under this condition, the linear equilibrium wholesale price was determined through two-way auction. Then, emergency repurchase contract was used to coordinate the two-level supply chain and obtain the constraints of contract parameters. Finally, an example was given to ana- lyze the impact of emergencies on the overall profit distribution in the supply chain. The research results show that when an emergency with increasing demand occurs, the linear equilibrium wholesale price and the expected profits of retailers will increase, but the weight of the retailers’ expected profits in the entire supply chain will be reduced. However, when an emergency with decreasing demand occurs, the linear equilibrium wholesale price and the expected profits of retailers will be reduced, but the weight of the retailers’ expected profits in the entire supply chain will increase. In addition, under certain constraints, the lower the retailer's valuation of goods is, the higher the weight of its profits in the entire supply chain is.