The supply chain optimization problem consists of decision variables, objective functions and constraints. Decision variables are decisions that need to be made. In logistics, there are the following decision variables: when and where to order raw materials from suppliers; When to produce; When to deliver products to customers and how much. The objective function is the goal to be achieved in economy or other aspects. There are the following objective functions in logistics: maximum profit; The supply chain has the lowest cost and shortest life cycle; The highest customer service quality; The shortest delay; Maximum output; Meet all customer needs, etc. Constraints are the conditions that variables must meet. In logistics, there are the following constraints: the supplier's ability to produce materials and parts; Daily working time and load of production line; Distribution center's ability to handle receipts and so on