In today’s world with increasingly complex and volatile global political and economic dynamics, international supply chains face unprecedented challenges, with disruption risks constantly looming. This paper investigates a two-echelon supply chain system consisting of one manufacturer, two suppliers, and one emergency supplier, focusing on how manufacturers should make pricing decisions and select procurement strategies during supply chain disruptions caused by unexpected events, particularly considering the susceptibility of consumer purchasing decisions to random reference price effects. The results show that: 1) When the probability of disruption of unreliable suppliers and the volatility of random reference prices are small, manufacturers will obtain greater profits by choosing a single-supplier procurement strategy; When the probability of disruption is high, the dual-source sourcing strategy is a better choice for manufacturers. 2) The volatility and interruption probability of the random reference price will significantly affect the manufacturer’s purchase volume of each supplier, the wholesale price of the supplier, the manufacturer’s pricing and the greenness of the product. 3) The degree of influence of unreliable supplier disruption probability and random reference price volatility on manufacturers’ pricing decisions is not determined.