Abstract: The determination of blending plans in batch manufacturing is a complex and time-consuming process that needs a lot of experiences. This paper proposes an approach to generation of blending planning using a cooperative multi-agent system. First, a model for the blending problem is developed based on operations research principles; Second, the architecture of the system is introduced; third, the cooperative problem solving process for blending planning generation using the multi-agent system is described. Finally, an application of our system in tea blending is presented.