Abstract: In this paper,we present an interval number linear programming method for the purpose of measuring the performance based on the customer service level and Introducing a coefficient α, we transform the interval number linear programming into the linear programming problems with parameterα, which makes the performance measurement method can reflecting the utility number of customer service of keep a promises and measuring more flexibly. Finally, a numerical case verifies the application value of our approach. It is show that, the multi-customer service is a main focus of competitive among the supply chain and it is a key of responding the market demand in the integrated supply chain. The measuring the performance based on the customer service level can reflect well and truly the whole performance of supply chain and has a important reference value.