Dynamic production scheduling method based on information node period search method (INPSM) was put forward to solve the chaos state of production scheduling in discrete manufacturing enterprises. The features of manufacturing elements in the production line were analyzed, and the information node was abstracted with the correlative features. The production process was described with the information node, and the whole production process was defined with several periods according to the features of resources competition. During each individual period, the interactive information nodes were scheduled to get the optimum scheduling. The globally optimal solution of production scheduling was achieved till the production process was completed. The complexity of scheduling can be reduced and the computability can be improved with INPSM. The optimum scheduling strategy can be rapidly obtained when the information nodes change dynamically. Application results prove that the INPSM can satisfy the actual requirement of production scheduling．