Abstract:The operation efficiency of supply chain in three nodes, named manufacturer, distributor and retailer is discussed based on the inventory. The supply chain takes the reactive type and effi cient type as the model basis. Firstly, the actual enterprise is regarded as a prototype, and the forecasting method is employed to predict the inventory levels of two types of supply chain. Afterwards, the hypothesis test is used for the signifi cance test of the two types of supply chain. The study results show that the inventory level of each node enterprise in the reactive supply chain system is significantly lower to that in the efficient supply chain systems, indicating the decrease of inventory levels at large amplitude.